1

Answer all questions

In each of the questions 1 to 50 pick one of the alternatives from (1), (2), (3), (4), (5) which is correct or most

appropriate and mark your response on the answer sheet with a cross (x) on the number of the correct option

in accordance with the instructions given on the back of the answer sheet.

01. Which of the following metabolic process occurred in cells is a exergonic reaction

1. Amino acids ⟶ proteins 2. .Glycerol + fatty acids ⟶ Lipids

3. Photosynthesis 4. cellular respiration

5. Production of ATP

02. Which of the following is not a main characteristic of water, important for the existence of life on earth.

1. Anonimous expansion upon freezing

2. Ability to maintain a moderate temperature

3. Cohesive behavior of water

4. Transparency of water

5. Ability of act as a solvent

03. Which of the following polysaccharide - monomer unit combination is incorrect.

polysaccharide Monomer unit

1. Pectine Pentose

2. Chitin Glucosamine

3. Inuline Fructose

4. Starch Glucose

5. Glycogen Glucose

04. In a DNA molecule Guanine is present five times than Adenine. If the DNA molecule has 36, 000

nitrogenous bases, addition of Guanine and Thyamine nitrogenous bases contain in that DNA mdecule

is,

1. 15, 000 2. 18,000 3. 6,000 4. 30,000 5. 3,000

05. Resolution power of compound light microscope is

1. 0.25 𝜇𝑚 2. 0.2 𝜇𝑚 3. 0.5 𝜇𝑚 4. 0.4 𝜇𝑚 5. 2.00 𝜇𝑚

2

06. Schleiden, Schwann and Virchow presented the ' cell theory '. The fact included in the cell theory present

by virchow is,

1. All organisms are made up of a single cell

2. All organisms are made up of one or more cells

3. All cells arise from pre - existing cells

4. The basic structural and functional unit of organisms is the cell.

5. The functional unit of organisms is cell

07. Some cellular organells and relevant functions are given below. Which of the following combination is

incorrect.

Cellular organell Function

1. Nucleus - production of ribosomes needed for protein synthesis

2. Golgibodies - produce lysosomes

3. Smooth endoplasmic reticulum - synthesizes steroids

4. Peroxisomes - Catalyze the breakdown of peroxides

5. Centrioles - provide strength to the cell

08. Which of the following is a difference between mitosis and meiosis. In meiosis

1. Pair of homologous chromosomes

2. Chromosomes get condensed

3. Nucleoli get disappeared

4. Meisois is started after the G2 phase of cell cycle.

5. It produces genetically identical cells

09. Which of the following is incorrect statement regarding cancers and tumors.

1. cancer cells donot respond normally to the body's control mechanism and regulate the cell cycle.

2. Activity of those cells required growth factors.

3. Cancer cells can be separate form the original site and spread in a new location

4. If the abnormal cells remain at the original site getting large they are called tumors

5. The body immune system can recognize and destroys them.

10. Following graphs are based on factors affecting for the enzymic activity.

Which of the following factors are given in correct order which represent the ' x ' axis

1. Enzyme concentration, Temperature, Substrate concentration, pH value

2. Enzyme concentration, pH value, Inhibitors, Temperature

3. Substrate concentration, temperature, Inhibitors, pH value

4. Substrate concentration, pH valuce, Inhibitors, Temperature

5. Substrate concentration, pH valuce, Temperature, Inhibitors

3

11. Products of light reaction of photosynthesis are

1. ATP 2. ATP, NADH and 𝑂2

3. ATP, NADPH and 𝑂2 4. ATP and NADH

5. ATP, NADPH and 𝐹𝐴𝐷𝐻2

12. Which of the following statement is incorrect regading 𝐶3 and 𝐶4 photosynthetic mechanisms,

13. Which of the following is incorrect statement

1. Two pyruvate molecules are produced by one glucose molecule in Krebs cycle.

2. Anaerobic respiration is two types as alcohol fermentation and lactic acid fermentation'

3. 32 ATP molecules are produced in aerobic respiration.

4. Surface area which occur oxidative phosphorylation is increased by mitochondria.

5. Total number of ATP produced in electron transport chain is 28

14. Select the correct statement regarding cyclic electron flow

1. It starts with the releasing of electrons by photosystem II

2. Released electrons from 𝑃680 is given to 𝑃700 molecule.

3. Hydrolysis of water takes place

4. 𝐴𝑇𝑃 is not synthesized

5. NADPH is not synthesized

15. Which of the following statement is incorrect regarding biological evolution

1. Natural selection is occurred due to competition and survival of the fittest.

2. Facts presented by Charles Darwin and Russel Wallace about inheritance of characteristics were

included in theory of natural selection.

3. High reproduction ability was one of the observation when presenting natural selection theory.

4. Organisms acquired adaptations during their life time. Evolution is occurred by passing of those

acquired characteristics to the next generations is says in Lamark theory.

5. Theory of natural selection is presented by Neo - Darwinism mentioning the formation of variations

by inheritance of characteristics.

16. Few scientists who contributed to classification of organisms and statement regarding their classification

is given below, which of the following combination is incorrect?

1. Theophrastus - Classified plants into 3 groups based on plant form

2. Ernest Haeckel - Introduced the taxon "Phylum"

3. Carolous linnaeus - Introduce 2 kingdoms of organisms plants and animals.

4. Carl woese - introduce 3 kingdom system

5. Robet whittaker - classify organisms, based on cellular organization, unicellular or multicellular and

mode of nutrition

𝑪𝟑 photosynthesis 𝑪𝟒 photosynthesis

1. 𝐶𝑂2 fix once

2. point of which no more 𝐶𝑂2 can be

taken up is high

3. 𝐶𝑂2 is fixing by only RUBP

carboxylase enzyme

4. First stable product is PGA

5. photosynthesis occurs in one type of

cell

1. 𝐶𝑂2 fix twice

2. point of which no more 𝐶𝑂2 can be taken up is

low

3. 𝐶𝑂2 is fixing by only PEP carboxylase enzyme

4. First stable product is OAA

5. photosynthesis occurs in 2 type of cells

4

17. Which of the following characteristic is common to Domain Archaea and Eukarya but cannot be seen

in Domain Bacteria

1. Prokaryotic cellular organization

2. Presence of branched hydrocarbons in membrane lipids

3. Circular chromosomes

4. Presence several kinds of 𝑅𝑁𝐴 polymerase enzymes

5. Nature of habitat

18. Which of the following characteristic feature is correct regarding cyanobacteria

1. All are colonial

2. All are photo - autotrophs

3. All fix atmospheric nitrogen

4. They posses motile cells

5. All are in fresh water

19. Question 19 is based on following organisms of kingdom protista.

A – Amoeba.sp B – ulva. sp C – Diatom.sp D – Eugleng Sp.

form the above organisms, unicellular, present of a pellicle, cell wall contain silica, marine forms in

correct order is,

1. D, C, A, B 2. A, C, D, B 3. B, A, C, D

4. A, D, C, B 5. A, B, D, C

20. Which is not a common characteristic for tow domains?

1. Initiate the protein synthesis by formyl methionine.

2. Presence of several types of RNA polymerase enzymes.

3. Presence of polysaccharides in cell wall.

4. Presence of unbranched lipids.

5. Not sensitive to antibiotics.

21. Which of the following is not an adaptation for current vast plant diversity and for being a plant primary

producer,

1. Seed consist of an embryo and an endosperm

2. Endosperm supply the required food for embryo

3. Endosperm is protected by seed coat

4. When seeds are matured they dispersed by various methods

5. Sporophyte is dominant plant

22. Which of the following is not a feature of monocotyledonous plant

1. Parallel veins in leaves 2. The embryo has only one cotyledon

3. Open vascular bundles 4. Flower parts are trimerous

5. Fibrous root system

23. Which of the following statement is correct regarding fungi

1. Asexual reproduction occurs by conidia in Ascomycota

2. zygomycota mycelium is branched uninucleated and septate

3. chytridiomycota produce zygosporangium in sexual reproduction

4. Both male and female gametes are motile in zygomycota phylum

5. Basidiomycota phylum is doing only asexual reproduction.

5

24. Which of the following cannot be seen in Arthropodes

1. Jointed appendages 2. Closed blood circulatory system

3. Segmentation 4. ventral nerve code

5. External skeleton.

25. Which of the following is incorrect regarding Amphibia

1. Moist Skin without scales 2. Both land and aquatic forms are present in life cycle.

3. Posses three chambered heart 4. Closed blood circulatory system.

5. Endothermic

26. Which of the following statement is incorrect regarding plant tissues.

1. Collenchyma tissues - photosynthesis

2. Cork - reduce water loss

3. xylum - Acent of sap

4. Phloem - Sucrose transpiration

5. Parenchyma tissue - Store materials

27. Which of the following has highest percentage of non - living cells

1. xylum tissue 2. secondary pholoem 3. bark

4. vascular cambium 5. cork cambium

28. Which of the following tissue, directly involve in the primary growth of plants.

1. vascular cambium

2. Apical meristems

3. Inter fascular cambium

4. cork cambium

5. Intra fascular cambium

29. Which of the following is incorrect regarding endodermis of plant roots

1. It's cell walls contain suberin

2. It seperats cortical apoplast form the vascular apoplast

3. It separate cortical symplast from the pericycle symplast

4. It is derived from ground tissue system

5. It helps to selective absorption of mineral ions.

30. Which of the following is incorrect regarding root apex of monocotyledonous plants.

1. Apical meristems produce new cells into both inward and outward direction

2. Root hairs differentiated from cell elongation area

3. Xylem differentiated form pro cambium

4. Pith differentiated from ground meristem.

5. Root cap present continuously.

31. Which of the following is not a adaptation of plant shoots for capturing light

1. Presence of a tall thick stem which gives mechanical support 2. Leaf venation.

3. Size of leaf base 4. Presence of a cuticle on leaf

5. Leaf arrangement (phyllotaxy)

6

32. Which of the following is covered by simple squamous epithelium.

1. Stomach 2. Skin 3. Alveoli

4. Bladder 5. convoluted tubules of nephrons.

33. Which of the following is a loose connective tissue

1. Blood 2. Elastin tissue

3. Bone tissue 4. Fibrous tissue

5. Areolar tissue

34. Select the correct statement regarding food digestion

1. Releases of bile to the duodenum is stimulated by cholecystokinin

2. Mobility of stomach is increased by Pepsin

3. Secretin act on stomach

4. Pepsinogen converted into pepsin is stimulated by secretin

5. Salivary secretion is stimulated by Gastrin

35. A and B are two adjacent cells which of the following statement is incorrect regarding A and B cells.

A B

1. Water potential of A cell is higher than B cell

2. Water moves from B cell to A Cell

3. Water moves until reached to equilibrium state

4. Solute potential of A cell is higher than B cell

5. Water moves due to the osmosis between cells

36. Select the incorrect combination regarding Selaginella strobill and cycas male cone.

Selaginella Cycas

1. Preset micro sporophylls and Macrosporophylls 1. Present only micro sporophylls.

2. Sporangial present in upper surface of the leaf 2. Sporangia present in lower surface of the leaf.

3. Both type of spores are produced 3. only one type of spore id produced

4. Small in size 4. large in size

5. Number of sporangia are produced in one 5. One sporangia is produced in one sporoghyll.

Sporophyll

37. Plant Pogonatum different from plant Nephrolepis due to,

1. Presence of flagellated sperms

2. presence of multi cellular antheridia and archigonia

3. Presence of a nonimortile female gamete

4. Fertilization needs water

5. do not present vascular tissues

𝜑𝑆 = −4 𝑀𝑃𝑎

𝜑𝑆 = +2 𝑀𝑃𝑎

𝜑𝑆 = −6 𝑀𝑃𝑎

𝜑𝑆 = +30 𝑀𝑃𝑎

7

38. Several characteristics of a plant is given

- Heterosporous

- No need of external water for fertilization

- has a branched pollen tube

- Monocious

The plant should be

1' Pogonatm 2' Selaginella 3' Cycas 4' cocos 5' Nephrolepis

39. Select the incorrect statement regarding human salivary glands

1. The largest salivary glands are parotid glands 2. It secrets amylase enzyme

3. It is a exocrine gland 4. It regulates by hormones

5. Saliva helps to speak

40. Following features are shown by a plant growth substances

- stimulates cell elongation

- maintain apical dominance

- regulate trophic movement

- stimulate growth of cambium

Above plant growth substance may be,

1. Auxin 2. Gibberellin 3. Pastonic acid

4. Ethylene 5. Abscisic acid

For each of the questions 41 to 50 one or more of the responses is / are correct. Decide which

response / responses is / are correct and then select the correct number

If only A B and D are Correct 1

If only A, C and D are Correct 2

It only A, B are correct 3

It only C and D are correct 4

It only other response or combination of responses are correct 5

1 2 3 4 5

A,B,D

Correct

A,C,D

Correct

A,B

Correct

C,D

Correct

any other response / combination of

response correct

41. Which of the following response is correct regarding vascular bundles of dicotyledonous plant

A. They are open vascular bundles

B. They are endarch, vascular bundles

C. They are exarch, polyarch vascular bundles

D. They are conjoint vascular bundles

E. They are closed vascular bundles

42. Which of the following nutrients and from of intake in correct order

Element From of intake

A. N 𝑁𝑂3− , 𝑁𝐻4

+

B. P 𝐻𝑃𝑂4−2 , 𝐻2𝑃𝑂4

− C. Mo 𝑀𝑜𝑂4

− D. B 𝐵𝑜3

−3 E' O 𝑂2 and 𝐶𝑂2

8

43. Select the correct statement regarding human skeletal muscle cell.

A. not branched B. uninucleated

C. Striated D. Cylindrical

E. involuntary

44. Which of the following is correct regarding human saliva

A. Secretion of saliva controlled by autonomic nervous system

B. It consist of antimicrobial factors

C. It digests carbohydrates

D. It is slightly alkali

E. It consists of urea 45. Which of the following process need ATP

A. Acent of sap B. Osmosis

C. Photosynthesis D. Glycolysis

E. Bulkflow

46. Which of the following is correct regarding fully turgid cell

A. 𝜑 = 0 B. 𝜑𝑃 = 𝜑𝑆 C. 𝜑 = 𝜑𝑃 D. 𝜑𝑃 = 0 E' 𝜑 = 𝜑𝑆

47. Which of the following phylum / phylums do not posses a external skeleton,

A. Annelida B. Echinodermata C. Mollusca

D. Cnidaria E. Arthropoda

48. Which of the following statement is correct regarding enzyme co - factors

A. They may be organic compounds or inorganic ions

B. Always they bind with enzymes.

C. Some of them increase the enzyme activity

D. Some of them act as electron carriers

E. Some of them are proteins

49. Which of the following statement is correct regarding galls in plants.

A. Invaded organisms such as virus, fungi, bacteria, insects and mites are affected for develop galls in

plants.

B. This occur due to uncontrolled mitotic division of plant cells

C. Spread of gall cells to locations distant from their original site is called metastasis

D. Galls do not affect for one or several organs

E. Galls harm to the growth of plants

50. Motile sexual reproductive cells cannot be seen in

A. Pogonatum B. Nephrolepis C. Aspergillus

D. Nostoc E. Selaginella

1

Part A - Structured Essay

01&'

A). i. Identify the above diagram and name the X

...................................................................................................................................................

ii. Name a - d part of above diagram

a – .......................................... c – ..........................................

b – .......................................... d – ..........................................

iii. (a) What is Y of the above diagram?

...................................................................................................................................................

(b) Write two main chemical compound of Y

...................................................................................................................................................

...................................................................................................................................................

2

iv. Write a function of each of a and b mentioned in the above diagram

a ................................................................................................................................................

b ................................................................................................................................................

v. (a) Write a function that perform by Y to the cell

...................................................................................................................................................

...................................................................................................................................................

(b) What is the main composition of X in the above diagram?

...................................................................................................................................................

...................................................................................................................................................

B). i. (a) What is the organelle that found in all living cells?

...................................................................................................................................................

(b) Write the chemical composition, function and the place where it is produced that you

mentioned above organelle.

Chemical composition - ............................................................................................................

Function - ............................................................................................................

Place where produce - ............................................................................................................

ii. Given bellow are the several compound in living matter

Haemoglobin, Keratin, Immunoglobulin, NAD, DNA, ATP

(a) What is / are the compound / s which are not polymers among the above compounds?

...................................................................................................................................................

(b) What is / are the proteins with quaternary structure?

...................................................................................................................................................

(c) Which protein / s bear secondary structure?

...................................................................................................................................................

(d) What is the polymer / s with nucleotide?

...................................................................................................................................................

(e) What is / are contribute to removing and destroying foreign particles?

...................................................................................................................................................

iii. Name two organic compounds that help to cause Arthrosclerosis condition of man / reduce

elasticity of blood vessels.

...................................................................................................................................................

...................................................................................................................................................

3

iv. Identify the main compound group which include the above III and write two functions

perform by that compound group to organisms

...................................................................................................................................................

...................................................................................................................................................

C). i. Write overall energy relations of living systems of biosphere by 4 steps.

...................................................................................................................................................

...................................................................................................................................................

...................................................................................................................................................

...................................................................................................................................................

...................................................................................................................................................

...................................................................................................................................................

ii. Write three places in living cells where ATP is synthesized.

...................................................................................................................................................

...................................................................................................................................................

...................................................................................................................................................

iii. ATP in living cells transformed to different types of energy. Mention such two types and usage

also

Type of energy Usage

...................................................................................................................................................

...................................................................................................................................................

iv. Write two methods that can be synthesized ATP in living cells.

...................................................................................................................................................

...................................................................................................................................................

02&' A). Given below is a diagram of a model which can use to determine the rate of photosynthesis of

an aquatic plant.

4

i. What is the name of the apparatus that use to this experiment?

...................................................................................................................................................

ii. Name the X solution and write the reason for inserting aquatic plant to it.

X ...................................................................................................................................

Reason .......................................................................................................................................

...................................................................................................................................................

...................................................................................................................................................

iii. Write the steps required to taken for studding the effect of light intensity on the rate of

photosynthesis by this model

............................................................................................................................................

...........................................................................................................................................

............................................................................................................................................

...........................................................................................................................................

............................................................................................................................................

...........................................................................................................................................

............................................................................................................................................

...........................................................................................................................................

iv. a) What is the principle that use in this experiment?

............................................................................................................................................

...........................................................................................................................................

b) What is the process takes place in the plant that produce the above product?

............................................................................................................................................

c) Mention the exact place of the plant where above process in IV - b takes place

............................................................................................................................................

iv. Write two main differences between process of cyclic electron flow and liner electron

flow of light reaction of photosynthesis.

Cyclic electron flow Linear electron flow

................................................................... .....................................................................

................................................................... .....................................................................

5

B). i. Name the Eon relevant to the following incidences.

a. Origin of the earth .........................................................................

b. Appearance of first seed plants .........................................................................

c. Appearance of soft bodied invertebrate

animals ........................................................................

d. beginning of increase of concentration of

atmospheric oxygen ......................................................................

ii. Write two main principles use to explain the theory of Lamarck about biological evolution.

...................................................................................................................................................

...................................................................................................................................................

iii. What are the steps taken place in the process of Natural selection?

...................................................................................................................................................

...................................................................................................................................................

..................................................................................................................................................

...................................................................................................................................................

..................................................................................................................................................

iv. According to the Darwin theory, some characteristic features of organisms encourage their

survival and reproduction. Write such two characters?

...................................................................................................................................................

...................................................................................................................................................

v. What is the basis that relates to explain the theory of Natural selection in Neo - Darwinism?

...................................................................................................................................................

C). i. Write an organism for each nutritional method given below in the kingdom Animalia.

a) Photosynthetic, presence of gas

filed bulb like sacks in stipes - '''''''''''''''''''''''''''''''''''''''''''''''''''''

b) Heterotrophs with two types of nuclei - '''''''''''''''''''''''''''''''''''''''''''''''''''''

c) mixotrophs - '''''''''''''''''''''''''''''''''''''''''''''''''''''

ii. Mention two specific characteristic features of organisms in kingdom protista

............................................................................................................................................

.............................................................................................................................................

iii. Write answer for the following questions based on Uiva

6

(a) Component of cell wall .............................................................................

(b) Photosynthetic pigments ............................................................................

(c) Storage food ............................................................................

iv. Given below is a structure which found in the reproduction of fungi

a) What is the phylum of this fungi?

................................................................................................................................................

b) Name the spores that produce in sexual reproduction of this fungi

..............................................................................................................................................

v. Name the phylum in kingdom fungi which contains septate and dikaryotic filaments.

................................................................................................................................................

03&' A) i. Mention two physiological features common for all cells in meristematic tissue

...................................................................................................................................................

...................................................................................................................................................

ii. What is a tissue?

..............................................................................................................................................

..............................................................................................................................................

iii. Given below is a cellular diagram of longitudinal section of an apex of plant shoot.

7

a) Name the parts A - G of the above diagram

A ....................................................... D .......................................................

B ....................................................... E .......................................................

C ....................................................... F .......................................................

G .......................................................

b) Mark and Name the overlapping regions in shoot apex

iv. Classify the meristematic tissues in plant body according to their location.

...................................................................................................................................................

...................................................................................................................................................

...................................................................................................................................................

B). i. Chart given below is the process of Alternation of generation in plants. Mention the suitable

stages for A, B, C, and D

ii. What are the incidences take place in the X and Y of the above life cycle?

X ........................................................... Y .........................................................................

iii. What is the main change that occurred in dominant generation of life cycles, with the

evolution?

...................................................................................................................................................

iv. Mention the homologous parts of reproductive structures of Anthophyta to the following parts

of Selaginella plant

Selaginella Anthophyta

a. Strobilus ......................................................

b. Megasporophyll ......................................................

c. Microsporophyll ......................................................

d. Microspores ......................................................

8

v. a) Write two adaptations that can be seen in plants to prevent self - pollination

........................................................................................................................................

.........................................................................................................................................

C). i. Name the following animal tissues and mention their location and main function

A B C

ii. a) What is plasmolysis?

...................................................................................................................................................

...................................................................................................................................................

...................................................................................................................................................

b) Mention the main pathways of flowing of water towards the endodermis which enters

into the root hair.

...................................................................................................................................................

...................................................................................................................................................

...................................................................................................................................................

iii. What is the pathway which block by endodermis, among the above pathways? give reason.

................................................................................................................................................

................................................................................................................................................

..............................................................................................................................................

4). (A) i. What are the essential elements in organisms?

................................................................................................................................................

................................................................................................................................................

..............................................................................................................................................

Type of Tissue Location Main function

A ............................................ ............................................ ............................................

B ............................................ ............................................ ............................................

C ............................................ ............................................ ............................................

9

ii. How many essential elements in plants?

................................................................................................................................................

iii. What is macro - nutrients?

................................................................................................................................................

................................................................................................................................................

................................................................................................................................................

iv. Name the macronutrients that need for plants.

................................................................................................................................................

................................................................................................................................................

................................................................................................................................................

v. Write the way of absorption and a function of following nutrients.

Element Way of absorption Function

N .................................................... .............................................................

Ca .................................................... .............................................................

Mg .................................................... .............................................................

P .................................................... .............................................................

S .................................................... .............................................................

(B) i. For which processes, plants need nutrients.

................................................................................................................................................

................................................................................................................................................

................................................................................................................................................

ii. How does following symbiotic associations fulfil their nutritional requirements?

(a) Host plant and epiphytic orchid

(b) Association of higher plant roots and fungi

(c) Cuscuta and host plant

iii. (a) Name the process which fulfil its organic nutrients by Nepenthas

................................................................................................................................................

................................................................................................................................................

................................................................................................................................................

10

(b) What is the special way of the above plant fulfil its Nitrogen requirement?

................................................................................................................................................

................................................................................................................................................

................................................................................................................................................

iv. Write a special place where Nepenthes plant that can be lived due to the nutritionals pattern

mentioned the above (b)

...................................................................................................................................................

C). i. Name the main plant growth substances. ...................................................................................................................................................

..................................................................................................................................................

..................................................................................................................................................

ii. What are the main plant growth substances which regulate the following fuctions?

a) Function in phototropism and gravitotropism

..............................................................................................................................................

b) Stimulate growth of pollen tube.

...........................................................................................................................................

c) Promotes stomatal closure during drought stress

...........................................................................................................................................

d) Promotes formation of roots and root hairs.

...........................................................................................................................................

e) Regulation of cell division of shoots and roots. ..............................................................................................................................................

iii. Mention the types of abiotic stress shown by plants

..............................................................................................................................................

.............................................................................................................................................

...........................................................................................................................................

iv. Write structural and functional defense mechanisms exist in plants to bear stress conditions. ..............................................................................................................................................

.............................................................................................................................................

...........................................................................................................................................

...........................................................................................................................................

11

Third Term Test – 2018p

Biology –Part II

Part B - Essay

Answer four questions only

05&' i. Draw a labaled diagram of cross section of a typical Dicotyledonous plant leaf and mention the

main tissues and a function for each.

ii. Discuss the way of architecture of plant shoots to capture maximum light

06&' i. Explain the following points regarding the enzymes

a. Define the enzyme.

b. Specific features of enzyme

c. Mechanism of enzyme activity

d. Mechanism of regulation of enzyme reactions in cells

ii. " Inactivate the enzyme by heat" Explain the above statement from the starch - amylase reaction.

07&' i. Mention the basis of present classification system

ii. Explain the characteristics that used to divide organisms into three domains.

08&' i. Explain the gross Structure of stomach of human digestive system.

ii. Explain the chemical digestion that occur in the stomach and list - out the function of stomach.

09&' Prepare a repot on the responses of plants for external and internal stimulus.

10&' Write short notes on

i. Skeletal muscle

ii. Heterotrophic nutrition of animals.

iii. Important characters of seedless vascular plants.

Third Term Test -2018 Grade 12- Biology Part 1 - Answers

-1-

Part II

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^48& 2

^49& 1

^50& 4

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