HOMEOSTASISMCQs

BOTANY:1) The capacity of a living system to lose water is:

A. Osmotic pressure B. Water potentialC. Osmosis D. Plasmolysis

2) The net movement of molecules remains in equilibrium when a cell is placed in:A. Hypotonic solution B. Hypertonic solutionC. Isotonic solution D. Non of these

3) Plants growing in marshes are termed as:A. Hydrophytes B. HalophytesC. Mesophytes D. Xerophytes

4) Plant cells, when constantly placed in hypotonic solution, does not burst because of the presence of: A. Vacuole B. PlastidsC. Cell wall D. Glyoxysomes

5) Plants get rid of surplus water by losing it in vapour form by a process called:A. Osmosis B. GuttationC. Transpiration D. Excretion

6) Enzymes are protected at high temperature by:A. Ice crystals B. Super coolingC. Freezing tolerance D. Heat shock proteins

7) For most of the organisms the normal temperature range for active life is:A. 100C to 350C B. 100C to 400CC. 200C to 400C D. 300C to 500C

8) In plants inhabiting cold regions, at the level of freezing point, the composition of solutes of cell is altered in a way that ice crystals are formed in:A. Plasma membrane B. CytosolC. Protoplasm D. Cell wall

9) Most of the plant cells synthesize heat shock proteins to protect enzymes and other proteins from denaturing at_____ or above.A. 400C B. 500CC. 450C D. 350C

10) When a plant cell is placed in concentrated solution or in hypertonic solution, it occurs.

A. Plasmolysis B. DeplasmolysisC. Osmosis D. Transpiration

11) In case of plants the concentration of a solution is biologically expressed as:A. Water potential B. Solute potentialC. Osmotic pressure D. Both A & B

12) A solution having higher water potential with respect to water potential inside the cell is called:A. Hypertonic B. HypotonicC. Isotonic D. Non of these.

13) Due to it further uptake of water in cytoplasm is resisted and finally stops, even if a plant cell is placed in hypotonic solution for a long time.A. Hydrostatic pressure B. Solute potentialC. Pressure potential D. Both A & C

14) The stem and leaves of these plants generally lack cuticle.A. Halophytes B. XerophytesC. Hydrophytes D. Mesophytes

15) The stomata are restricted on the upper surface of leaves in partially submerged:A. Halophytes B. XerophytesC. Hydrophytes D. Mesophytes

16) The plants growing in salt marshes close to sea are termed as:A. Hydrophytes B. HalophytesC. Mesophytes D. Xerophytes

17) To prevent excessive transpiration mesophytes have developed:A. Cuticle B. StomataC. Epidermis D. Cortex

18) The stem and leaves of these plants are succulent.A. Mesophytes B. XerophytesC. Halophytes D. Hydrophytes

19) Xerophytes grow in:A. Deserts & steep hills B. MarshesC. Watered soil D. Water

20) It is common in plants growing in tropical rain forests.A. Guttation B. TranspirationC. Osmoregulation D. Excretion

21) Reduction in number of stomata, sunken type of stomata, development of hairy epidermis, etc are adaptations found in:A. Mesophytes B. HalophytesC. Xerophyte D. Hydrophytes

22) It does not pose serious problems in plants.A. Thermoregulation B. TranspirationC. Homeostasis D. Excretion

23) In plants ions present in excessive concentration combine with organic compounds and are deposited in:A. Heart wood B. BarkC. Cells at the point of their death D. All of the above.

24) Some land plants loss water in liquid from points called hydathodes by process called:A. Respiration B. TranspirationC. Guttation D. Photosynthesis

25) It is not true for plants. A. Do not excrete nitrogenous wastesB. Excrete nitrogenous wastes.C. Recycle breakdown products of nitrogen metabolism.D. Metabolism of plants is mostly carbohydrate based.

HOMEOSTASISKEY

BOTANY: 1) B. 2) C. 3) B. 4) C. 5) C. 6) D. 7) A. 8) D. 9) A. 10) A. 11) D. 12) B 13) D. 14) C. 15) C. 16) B. 17) A. 18) B. 19) A. 20) A. 21) C. 22) D. 23) D. 24) C. 25) B.

ZOOLOGY:

1) It is not a way of obtaining heat by organism. A. Solar radiation B. Metabolism C. Muscle contraction D. Sweating2) It does not happen during regulation of cold temperature. A. Sweating B. Shivering D. Vaso contraction D. Subcutaneous fat accumulatio3) The process of removal of metabolic wastes is called. A. Homeostasis B. Excretion C. Osmoregulation D. Thermoregulation4) The excretory organs of Annelids are: A. Flame cells B. Nephridia

C. Kidneys D. Liver5) The hormone involved in the reabsorption of water from kidneys is: A. Aldosterone B. Parathormone C. ADH D. Non of these6) The most abundant component of urine is: A. Urea B. Water C. Ammonia D. Uric acid7) Which of the following is called thermostat of the body? A. Pituitary gland B. Hypothalmus C. Kidney D. Adrenal gland8) Mammals lacking sweet glands promote heat loss through: A. Aestivation B. Hibernation C. Panting D. Non of these9) Normal set point of human body temperature is: A. 370F B. 98.60C C. 300C D. 370C10) Animal if placed in _____________ solution, it bursts. A. Hypertonic B. Hypotonic C. Isotonic D. Non of these11) Among various animal groups only these became the most successful land

dwellers.A. Echinodermates and VertebratesB. Vertebrates and Arthropods.C. Arthropods and Echinodermates.D. Vertebrates and Annelids

12) The insects have developed an external water proof layer called: A. Epidermis B. Water proof layer C. Keratinized epidermis D. Cuticle13) Reptiles, birds and insects excrete nitrogenous waste called: A. Ammonia B. Uric acid C. Creatinine D. Urea14) Some mammals e.g. camel make use of water produced during the break

down of body: A. Protein B. Amino acids C. Carbohydrates D. Fats15) Fresh water protoctists e.g. Paramecium, etc bear for osmoregulation: A. Contractile vacuole B. Vacuole C. Protonephridium D. Gullet16) Marine bony fishes have ___________ internal environment so they are

liable to lose water.

A. Hypotonic B. Isotonic C. Hypertonic D. Both A & B17) The salts taken in along with water during constant drinking by marine

bony fishes are actively excreted by:A. Special glands in their rectum.B. Special excretory cells in the gills.C. Kidney.D. Liver.

18) As the filtration rate in kidneys of marine bony fishes is very low, so they excrete very small quantity of:

A. Dilute urine B. Concentrated urine C. Isotonic urine D. Uric acid19) Sharks and rays maintain relatively slightly hypertonic osmotic pressure of

body fluids than their surrounding by storing high concentration of ______ in their bodies.

A. Water B. Ammonia C. Uric acid D. Urea20) In sharks excess salts are removed from the body by:

A. Kidney.B. Special glands in their rectum.C. Special excretory cells in their gills.D. Special excretory cells in their skin.

21) Which of the following is not true for ammonia?A. It requires large amount of energy for its excretion.B. It is a small gaseous molecule.C. Excreting ammonia by an organism is advantageous as no energy is

required for its excretion.D. Its removal requires a lot of water for its dilution.

22) In fishes most of the ammonia is excreted as ammonium ions through: A. Kidneys B. Rectum C. Liver D. Gills23) In addition to mammals these also excrete urea.

A. Amphibians and Reptiles.B. Amphibians, Birds and Bony fishes.C. Amphibians, sharks and some bony fishes.D. Amphibians, Reptiles and Sharks.

24) Urea is produced by a metabolic cycle in: A. Kidney B. Gall bladder C. Liver D. Intestine25) In Hydra nitrogenous waste is in the form of:

A. Hypoxanthine B. Ammonia C. Uric acid D. Urea26) Which of the following is not correct for Hydra?

A. Nitrogenous waste is in the form of ammonia.B. Ammonia is removed by simple diffusion.C. Diffusion occurs from external as well as from internal surface.D. Ammonia is removed out through mouth.

27) The excretory and osmoregulatory organs of earthworm are called: A. Metanephridia B. Nephrostomes C. Protonephridia D. Nephridiopores28) Protonephridia are excretory structures found in: A. Hydra B. Planaria C. Cockroach D. Earthworm29) Malpighian tubules arise from:

A. Junction of midgut and hindgut.B. Junction of foregut and midgut.C. Midgut.D. Hindgut.

30) Which of the following is mismatched?A. Cockroach--------- Malpighian tubules-------- Uric acid.B. Earthworm-------- Metanephridia---------- Ammonia.C. Hydra--------- Flame cells----------- Ammonia.D. Planaria------- Protonephridia------- Ammonia.

31) In mammals these organs play extremely important role in maintaining homeostasis in the body.

A. Kidney, liver and skin. B. Liver, lungs and skin. C. Kidney, liver and heart D. Liver, brain and heart. 32) Gall bladder is attached with liver for storage of:

A. Glucose B. Bile pigments C. Bile D. Vitamins A & B

33) It is not the function of liver.A. Formation of vitamins A & D.B. Formation of cholesterol.C. Metabolism of charbohydrates and lipids.D. Deamination and urea formation.

34) Deamination and urea formation occurs in: A. Spleen B. Kidney C. Large intestine D. Liver35) Liver maintains concentration of ___________ in blood. A. Glycogen B. Glucose

C. Glucagon D. Glactose36) It removes lipids from blood either by oxidation or by modification and

subsequently stores as fat. A. Skin B. Kidney C. Small intestine D. Liver37) Ornithine cycle occurs in: A. Kidney B. Liver C. Lungs D. Adrenal gland38) The salts found in bile are:

A. Sodium glycocholate and Sodium taurocholate.B. Sodium chloride and Sodium carbonate.C. Sodium taurocholate and Sodium chloride.D. Biliverdin and Bilirubin.

39) Cholesterol is chiefly synthesized in: A. Liver B. Heart C. Gall bladder D. Stomach40) Bile salts are involved in: A. Digestion of fats B. Digestion of lipids C. Detoxification D. Emulsification of fats 41) Liver plays important role in maintaining body temperature

(thermoregulation) due to all of these with exception of: A. Efficient blood supply B. Large size C. Enzyme catalase D. High metabolic rate42) Its excess amount in gall bladder can precipitate to form gall stone which

may lead to jaundice. A. Bilirubin B. Cholesterol C. Bile pigment D. Biliverdin43) The enzyme present in high concentration in the cells of liver is: A. Catalase B. Pepsin C. Sacrase D. Bile44) Bile salts are involved in the emulsification of fats in: A. Liver B. Small intestine C. Stomach D. Duodaenum45) It is not the part of urinary system of man.

ZOOLOGY:KEY

1) D. 2) A. 3) B. 4) B. 5) C. 6) B. 7) B. 8) C. 9) D. 10) B. 11) B. 12) D.

13) B. 14) D. 15) A. 16) A. 17) B. 18) B. 19) D. 20) B. 21) A. 22) D. 23) C. 24) C. 25) B. 26). D. 27) A. 28) B. 29) A. 30) C. 31) A. 32) C. 33) A. 34) D. 35) B. 36) D. 37) B. 38) A. 39) A. 40) D. 41) C. 42) B. 43) A. 44) D.