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SMJK CHUNG LING PULAU PINANG

MID-YEAR EXAMINATION 2012

FORM 5 BIOLOGY (PAPER 1)

NAME: _________________________________________ ( ) SCHOOL NO.: ______________

CLASS: 5S__________ Duration: 1 Hour 15 minutes

This question paper consists of 50 questions. Please answer all questions. 1. Which of the answers in the table correctly identifies

these body components? 1 brain, spinal cord and nerves 2 blood 3 neurone 4 stomach

cell tissue organ Organ system

A B C D

2 2 3 3

3 4 2 2

1 3 1 4

4 1 4 1

2. The diagram below shows an animal cell.

Which is the functional relationship between the labeled structures? A 1 is synthesized by 4 B 2 develops into 6 C 3 contains products synthesized by 5 D 4 controls the contents of 5

3. Four strips are cut from a fresh potato. The length of

each strip is measured. One strip is placed in water, the others in different concentrations of sugar solution. After an hour, the strips are measured again. The results are shown in the table. Which liquid is water?

liquid Original length of strip (mm)

Final length of strip (mm)

A B C D

75 78 82 86

75 85 80 87

4. Which property of water is essential for blood to be

pumped by the human heart? A it has a high specific heat capacity B it is an excellent solvent C it is most dense at +4°C D it is incompressible

5. A type of food gives the following results on testing:

� A purple colour in the biuret test � A blue colour when heated with Benedict’s

solution � A yellow colour with iodine � A white emulsion with ethanol

What nutrients does the food contain? A fat and protein B protein and reducing sugar C reducing sugar and starch D starch and fat 6. Starch is digested to maltose by enzyme amylase.

According to the ‘lock and key’ hypothesis, which is the ‘key’ and which is the ‘lock’?

‘key’ ‘lock’

A B C D

Amylase Amylase Starch

Maltose

Maltose Starch

Amylase Amylase

7. The diagrams represent an enzyme molecule and its

substrate. Which diagram shows these molecules after they are heated to 100°C?

8. The table shows the results of an investigation on the

absorption of products of digestion in the presence and absence of oxygen.

Product of digestion

Absorption in the presence of

oxygen (arbitrary units)

Absorption in the absence of

oxygen (arbitrary units)

Amino acids Fatty acids Glucose glycerol

5.3

1.9

6.4

4.8

1.7

2.0

2.3

4.7

2

Which conclusion can be drawn from these results? A All products of digestion are absorbed by both active

transport and diffusion B All products of digestion are absorbed by diffusion

only C Amino acids and glucose are absorbed by active

transport only D Fatty acids and glycerol are absorbed mainly by

diffusion 9. A person’s diet contains more protein than is needed

for growth and repair. This causes increased production of

A carbon dioxide C sweat B hormones D urea 10. The statements are about how the liver deals with

excess glucose. 1 It is converted to amino acids 2 It is converted to fats 3 It is deaminated to produce urea 4 It is stored as glycogen Which statements are correct? A 1 and 2 only B 1,2 and 3 C 2 and 4 D 4 only 11. Two hours after a student ate a meal of protein, fat

and carbohydrate, the contents of the blood in the hepatic portal vein and the hepatic vein were compared. Which comparison is correct?

Blood in the hepatic portal vein

Blood in the hepatic vein

A B C D

Less amino acids Less red blood cells More glucose More urea

More amino acids More red blood cells Less glucose Less urea

12. The cell sap of a root hair cell has a higher

concentration of nitrates than the surrounding soil. Which feature of the cell stops these nitrates moving back from the cell to the soil?

A Cell membrane B Water potential gradient C Large surface area D Cell wall 13. Two tubes containing human blood are treated as

shown.

Tube X Tube Y

2cm3 blood

Anti-clotting agent 15 cm

3 salt solution

2cm3 blood

Anti-clotting agent 15 cm

3 distilled solution

The tubes are then spun at high speed to make the blood cells sink to the bottom.

Which explains the difference in the appearance of the tubes?

Tube X Tube Y

A B C D

The cells have lost water and become smaller The cells have stuck together The salt has made the cells clot Spinning has made the cells collect at the bottom

The water has made the blood clot The cells have lost water and shriveled The water has diluted the blood The cells have gained water and burst

14. The photomicrograph shows part of a section of a

plant

Samples of the contents of cell X were tested. What

results are expected?

Benedict’s reagent

Iodine

A B C D

+ + - -

+ - + -

Key: + = positive result - = negative result

15. The coronary arteries carry blood to the A brain tissue C liver cells B heart muscles D walls of alveolus 16. The diagram shows a valve in a section through a

blood vessel.

Which statement is correct? A Blood flows from X to Y, opening valve B Muscles in the wall contract and close the valve,

preventing backflow. C The elastic wall causes the valve to close

between heartbeats D The valve is forced open when the blood

pressure at y is greater than at X

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17. Which blood vessel carries blood with the lowest concentration of urea?

A hepatic portal vein B pulmonary vein C renal vein D vena cava 18. The diagrams represent the circulatory system. Which diagram is correct for an adult human?

19. The diagrams show the epithelium lining the

bronchioles in a non-smoker and a smoker.

As a result of the changes, what will the smoker

experience? A more lung infections B more mucus running down the nose C the bronchioles become wider D the cilia will beat more rapidly 20. Which reaction is catalysed by carbonic anhydrase

when red blood cells pass through the lungs? A CO2 + H2O→H2CO3 B HCO3

- + H

+ → H2CO3

C H2CO3→ CO2 + H2O D H2CO3→ H

+ + HCO3

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21. Which process does not require energy? A Contraction of muscles B Synthesis of proteins C Tissue respiration D Transmission of nerve impulses 22. What does yeast gain from fermentation? A carbon dioxide for respiration B energy for growth C ethanol for growth D glucose for respiration

23. Carbon dioxide turns limewater cloudy (milky). Which of the following would demonstrate that

expired air contains much carbon dioxide?

24. The diagram shows part of the human urinary

system. Where is urea most concentrated?

25. Blood samples from three veins in the body were

tested for the concentration of oxygen, carbon dioxide and urea. The results, in arbitrary units are shown in the table.

vein Oxygen

concentration Carbon dioxide

concentration

Urea concentration

1 2 3

40 40 90

48 48 40

1.5 7.5 4.0

The blood from which veins was sampled?

Hepatic vein

Pulmonary vein

Renal vein

A B C D

1 2 3 3

2 3 1 2

3 1 2 1

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26. Which factors are controlled by homeostasis?

Glucose Concentration in blood

Water content in the ileum

Temperature in the stomach

pH in the duodenum

A B C D

√ √ √ X

√ X X √

X √ √ √

√ √ X X

Key:

√ = controlled by homeostasis

X = not controlled by homeostasis

27. The graph shows the concentrations of glucose and insulin in the blood of a healthy person. Which graph shows the changes expected after a meal containing starch?

28. The diagram shows a cell during mitosis.

At the end of mitosis, which daughter cells will be produced?

29. The diagram shows how energy from food is used

by a wildebeest.

What percentage of this energy is available to

consumers and decomposers? A 100 C 66 B 96 D 4 30. The diagram shows four food chains leading to

humans.

Which chains make the most efficient use of solar

energy? A 1 and 2 C 2 and 3 B 1 and 4 D 2 and 4 31. The diagram shows forest and farmland on both

sides of a river.

The forest is cut down. What will be the most likely

effect and how is it connected to the cutting down of the forest?

Likely effect How it is connected to the cutting down of the forest

A B C

Flooding of the farmland Gradual change to desert conditions Increase in number of water plants

Water running off cleared area Global warming More light on river

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D

Water logging of cleared area

Trees no longer transpiring

32. A farmer sprays insecticide on his crops for a year.

The insecticide washes off into a lake where it is absorbed by the producer to enter the food chain.

Which gives the levels of insecticide in these

organisms at the end of the year? ppm=parts per million

Unicellular

green

plants/ppm

Freshwater

crustaceans/ppm

Small

fish/ppm

Fish-

eating

birds/ppm

A B C D

0.05

0.05

0.05

25.0

0.5

0.05

0.5

5.0

0.05

0.05

5.0

0.5

0.05

0.05

25.0

0.05

33. The diagram shows a cross section through a stem.

The tissues labeled X in the stem were treated with a poison that prevents respiration. As a result, the movement of sugars through X slowed down.

What identifies the tissue and explains the

observation?

tissue Explanation:energy not released by

A B C D

Phloem Phloem Xylem Xylem

Mitochondria in the companion cells Mitochondria in the sieve tubes Mitochondria in the vessels Nuclei in the vessel

34. Four processes that take place in the human body

are listed. 1 absorption of amino acids through the villi 2 maintenance of constant body temperature 3 production of lactic acid in muscles 4 regulation of blood glucose concentration Which two processes are directly controlled by

negative feedback? A 1 and 3 C 2 and 3

B 1 and 4 D 2 and 4 35. Which information about insulin or glucagon is

correct? A Excess insulin results in diabetes mellitus B Glucagon is broken down in the liver C Glucagon is manufactured in the liver D Insulin raises the blood glucose level 36. How do the air pollutants such as smoke and dust

affect the photosynthetic process in plants? A Block the stomatal pores B Reflects the sunlight that reaches the leaves C Destroy the chlorophyll D Cause the shedding of leaves of plants 37. Which of the following are examples of steroid? I Oestrogen II Glucagon III Cholesterol IV Insulin A I and III B II and IV C I, III and IV D II, III and IV 38. Which of the following can be synthesized by

human body? I RNA II Glycogen III Vitamin C IV Essential amino acid A I and II B III and IV C I, II and IV D I, II, III and IV 39. Which of the following can cause disruption to the

process of mitosis and meiosis? I X-rays II Ultraviolet rays III Fungicide IV Asbestos A I and II B III and IV C II, III and IV D I, II, III and IV 40. Nerve impulse can only be carried from a terminal

dendrite across the synapse to the dendrite of the next neurone and not the other way round. This is because

A Synaptic vesicles are only found in the synaptic knob at the end of each terminal dendrite.

B Only terminal dendrites are able to absorb sodium ions

C Dendrites are not able to generate electric charges

D The membrane of a dendrite is not permeable to electric charges

41. The pituitary gland is often referred to as the master

endocrine gland. This is because A It is the largest endocrine gland in the body B it is located in the brain

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C It is the most productive endocrine gland D It controls many other endocrine glands 42. Which of the following hormones is not produced by

the pituitary gland? A Follicle-stimulating hormone B Oestrogen C Luteinising hormone D Thyroid-stimulating hormone 43. A student steps on a rusty iron nail while playing

football in a field. What treatment should be given to the student?

A Polio vaccine injection B Typhoid vaccine injection C Diptheria serum injection D Antitetanus serum injection 44. Diagram below show three human vertebrae.

Which of the following is named correctly for X, Y

and Z respectively?

X Y Z

A B C D

Lumbar

Thoracic

Cervical

Cervical

Thoracic

Cervical

Lumbar

Thoracic

Cervical

Lumbar

Thoracic

Lumbar

45. Diagram below shows a protein structure.

Which of the following are examples of this type of

protein? I Thyroxine II Haemoglobin III Keratin IV Pepsine A I and II only B I and IV only C II and III only D III and IV only 46. The diagram below shows a movement of a

grasshopper.

Ground What are the actions of flexor muscle and extensor muscle to allow this movement?

Flexor muscle Extensor muscle

A B C D

Contract Relax Relax Contract

Contract Relax Contract Relax

47. Which of the following is not the function of the

lymphatic system? A Lymph nodes destroy old red blood cells B Lacteals transport fatty acids and glycerol from

small intestine C Lymph vessels return interstitial fluid into

circulatory system D Lymph transport lympocyctes throughout the

body 48. The table below shows the number of plant A

present in 10 different quadrats, each measuring 1m x 1m.

Quadrat number

I II III IV V VI VII VIII IX X

Number of plant A

14 10 0 22 18 16 12 0 15 13

Calculate the density of A. A 18m

2 C 15 m

2

B 12 m2

D 120 m2

49. The haemoglobin content of a pregnant mother is low. Which food should be taken to increase the haemoglobin content in her blood?

A Banana C Potatoes B Spinach D Tomatoes 50. What is the function of the axon of a sensory

neuron? A to release neurotransmitter in the synaptic cleft B to carry impulse away from the cell body C to speed up the conduction of impulse D to carry impulse towards the cell body END OF QUESTION PAPER Prepared by: Pang KT Checked by: Woo BS

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SMJK CHUNG LING PULAU PINANG

MID-YEAR EXAMINATION 2012

FORM 5 BIOLOGY

PAPER 2 ( 4551/2 )

NAME : __________________________( ) SCHOOL NO. : ______________

CLASS : 5S ___________ DURATION : 2 hours 30 minutes

Section A : ( 60 marks )

Answer all the questions.

1. Diagram 1 shows the process of synthesis and secretion of extracellular enzymes in a cell.

Diagram 1 (a) Based on Diagram 1, name X and Y. [2 marks] X: …………………………………………… Y: ………………………..………………

(b) Extracellular enzymes are enzymes which are produced in the cell but secreted from the cell to function externally. Give one example of the cell shown in Diagram 1. [1 mark] ……………………………....................................................................................………………………. (c) Explain what will happen to the production of extracellular enzymes if Y malfunctions. [2 marks] …………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

(d) Each enzyme has an optimum temperature at which its reaction rate is the fastest.

Beyond the optimum temperature, an enzyme is said to be denatured.

Explain the above statement. [2 marks] …………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

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(e) Describe the role of protein molecules in facilitated diffusion. [3 marks ]

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

(f) State the differences between saturated fats and unsaturated fat. [2 marks ]

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

2. Diagram 2.1 shows gaseous exchange between the alveolus and the blood capillary in the human lungs and between the blood capillary and body tissues.

Diagram 2.1

(a) (i) What is Y ? [1 mark] …………………………………………………………………………………………………………. (ii) State two adaptations of structure Y to make it efficient in the gaseous exchange. [2 marks] ………………………………………………………………………………………………………….

………………………………………………………………………………………………………….

………………………………………………………………………………………………………….

(b) (i) A pigment is needed to help erythrocytes transport oxygen. Name the pigment. [1 mark]

…………………………………………………………………………………………………………. (ii) Write a word equation to represent the chemical reaction between the pigment mentioned in (b)(i) and oxygen. [1 mark ] …………………………………………………………………………………………………………. (c) Describe how carbon dioxide is transported from the body tissues to the alveoli. [3 marks] …………………………………………………………………………………………………………….

…………………………………………………………………………………………………………….

…………………………………………………………………………………………………………….

…………………………………………………………………………………………………………….

…………………………………………………………………………………………………………….

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(d) Diagram 2.2 shows a graph that relates light intensity and the ‘M’ point.

Diagram 2.2

(i) What is the name given to ‘M’ point? [1 mark]

………………………………………………………………………………………………………….

(ii) Define ‘M’ point. [2 marks]

…………………………………………………………………………………………………………….

…………………………………………………………………………………………………………….

…………………………………………………………………………………………………………….

3. Diagram 3.1 represent the circulatory system, the lungs and body cells.

Diagram 3.1

(a) On diagram 3.1,

(i) labelled blood vessels Q and R;

(ii) identify pumps X and Y. [4 marks]

(b) In the space below, draw a labelled diagram of a cross section of vessel R and a blood capillary. [2 marks]

Blood vessel R blood capillary

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(c) Explain how the structure of a blood capillary allows materials carried in the blood to reach a cell in the

body. [2 marks]

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

(d) State one chemical, other than a respiratory gas, which passes in increased amount from capillaries to

muscle cells at the start of a race. [1 mark]

…………………………………………………………………………………………………………………

(e) Diagram 3.2 shows a section through the heart.

Diagram 3.2

(i) On diagram 3.2, draw, in the correct position, and label

(a) the tricuspid valve,

(b) the bicuspid valve. [2 marks]

(f) Explain what is meant by a double circulation. [1mark]

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

4. Diagram 4.1 shows the human skeleton.

Diagram 4.1 (a) On diagram 4.1

(i) circle the axial skeleton. [ 1 mark]

(ii) name the part labelled A, B and C. [3 marks]

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(b) State two functions of the human skeleton. [2 marks ]

1. …………………………………………………………………………………………………………

………………………………………………………………………………………………………….

2. …………………………………………………………………………………………………………

………………………………………………………………………………………………………….

(c) Name the type of joint that is formed in between bones D and E. [1 mark]

…………………………………………………………………………………………………………………..

(d) Diagram 4.2 shows three types of vertebrae.

Diagram 4.2

(e) (i) Which part of vertebra P is not found in the other vertebrae which shown above? On diagram 4.2, mark

it with X and name it. [2 marks]

(ii) What is the function of the part you name in (e) (i)? [1 mark ]

…………………………………………………………………………………………………………….

(f) State two characteristics that differentiate vertebra R from other vertebrae shown in diagram 4.2. [2 marks]

1. ………………………………………………………….…………………………………………………..

2. ………………………………………………………….…………………………………………………..

(g) State the characteristic of a good posture when standing. [1 mark]

………………………………………………………….………………………………………………………

…………………………………………………………………………………………………………………..

5. (a) Based on the diagram 5.1, describe the pathway involved in the transmission of nerves impulses which result in the reflection when a hot object was touched. [ 4 marks ]

Diagram 5.1

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…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

(b) Diagram 5.2 shows some human endocrine glands

Name the endocrine glands labeled P and R. [2 marks] P: ……………………………………….. R: …………………………………………..

(c) Name a hormone that is produced by the main gland that control the secretion of gland Q. [1 mark]

……………………………………………………………………………………………………………..

(d) Name a hormone that is secreted by gland Q. [1 mark]

……………………………………………………………………………………………………………..

(e) State two functions of the hormone in question (d). [2 marks]

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

(f) State the effects of hormonal imbalance of insulin. [2 marks]

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………

P

R

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SECTION B ( 40 marks )

Answer all the questions.

6. (a) Amoeba sp. is a unicellular organism which lives in fresh water environment. Although Amoeba sp. is made up of only a single cell, it can perform all living processes. Explain the living process that enable Amoeba sp. to survive in fresh water which is hypotonic to the cytoplasmic fluid of Amoeba sp. [ 4 marks] (b) Explain the human respiratory response and rate of respiration in different situations as named below.

(i) At high altitudes

(ii) In fear [6 marks]

(c ) Diagram 6 shows the digestive system of a herbivore.

Diagram 6

Describe how cellulose in the plant fibres are digested and how the products of digestion of cellulose are absorbed into the body of the herbivore. [10 marks]

7. (a) Using a labeled diagram, describe the process that take place during prophase I of an animal cell.

[4 marks]

(b) Mitosis and meiosis are two important yet different processes of cell division occurring in all living

organisms.

Based on the statement above, state the differences between mitosis and meiosis. [6 marks]

(c) The statements below describe the lymphatic system.

Statement I : Lacteals in interstinal villi transport products of lipids

Statement II : About 10% of interstitial fluid returns to the circulatory system via the lymphatic system. Based on these statements, explain why the lymphatic system is considered complementary to the blood circulatory system.

[10 marks]

END OF QUESTION PAPER

Set by : KooPY

Checked by : WooBS

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SMJK CHUNG LING PULAU PINANG MID-YEAR EXAMINATION 2012 FORM 5 BIOLOGY (PAPER 3)

NAME: _________________________________________ ( ) SCHOOL NO.: ______________ CLASS: 5S__________ Duration: 1 Hour 30 minutes This question paper consists of two questions. Answer all the questions. Question 1 [33 marks]

An experiment was carried out to investigate the effect of different concentrations of sucrose solutions on potato tissues. The following steps were carried out: Step 1:

Four pieces of potato disc with thickness of 2 mm each were obtained from a potato. The initial diameter of each disc was 1.5 cm.

Step 2:

Each disc was immersed in a petri dish containing different concentration of sucrose solution.

Step 3:

After 20 minutes, the potato discs were removed and wiped dry with a filter paper.

Step 4:

The final diameter of each potato disc was measured and recorded. Diagram 1 shows the initial diameter for each potato disc.

Diagram 1 shows the initial diameter for each potato disc.

Diagram 1

Table 1 shows the results of the experiment. Concentration of sucrose solution, M

Final diameter of potato disc after 20 minutes, cm

0.2

2

0.4

0.6

Table 1 (a) Record the final diameter of each potato disc in the spaces provided in Table 1. [3 m]

(b) (i) State two different observations based on Table 1.

Observation 1:

Observation 2:

[3 m] (ii) State the inference which corresponds to each observation in 1(b)(i).

Inference for observation 1:

Inference for observation 2:

[3 m]

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(c) Complete Table 2 based on the experiment.

Table 2 [3 m] (d) State the hypothesis for this experiment.

[3 m] (e)(i) Construct a table and record all the data collected in this experiment.

Your table should have the following titles: � Concentration of sucrose solution � Initial diameter of the potato disc � Final diameter of potato disc � Percentage change in diameter of potato disc

[3 m]

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(ii) Use the graph paper provided to answer this question. Using the data in 1(e)(i), draw a graph to show the relationship between the percentage change in diameter of potato disc and the concentration of the sucrose solutions.

[3 m] (f) Based on the graph in 1(e)(ii), state the concentration of sucrose solution which is isotonic to the

concentration of the cell sap of the potato. Explain your answer.

[3 m] (g) The experiment is repeated by using another potato disc of the same initial size. The disc is immersed in

distilled water for 20 minutes. Predict the result of this experiment. Explain your prediction.

[3 m] (h) Based on this experiment, define osmosis.

[3 m]

(i) Another experiment is carried out to study the effect of different concentrations of sucrose solutions on the tissue of spinach strips. The observation of the experiment is shown in Diagram 2.

Diagram 2

Classify the sucrose solutions P, Q and R. [3 m]

Concentration of sucrose solution, M Type of solution compared to the concentration of cell sap of spinach

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2. All living organisms constantly need to exchange substances with their surroundings in order to survive and grow. The exchange of substance such as water occurs across the plasma membrane of the cells by diffusion. The rate of diffusion of the substance across the plasma membrane in organisms depend on the total surface area to volume (TSA/V) ratio. Diagram 2.1 shows the TSA/V ratio for unicellular and multicellular organisms.

Diagram 2.1

Base on the above information design a laboratory experiment to study the effect of total surface area to volume (TSA/V) ratio towards the rate of diffusion of substances by using potato. The planning of your experiment must include the following aspects:

� Problem statement � Aim of investigation � Hypothesis � Variables � List of apparatus and materials � Technique used � Experimental procedure or method � Presentation of data � Conclusion

[17 marks]

END OF QUESTION PAPER

Prepared by: Pang KT Checked by: Woo BS