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Question Bank No: 3

1. Product of glycolysis is

a)		Citric acid
b)		Dihydroxy acetone
c)		Pyruvic acid
d)		Phosphoenol pyruvate

2. Pyruvic acid is formed at the end of

a)		Calvin cycle
b)		Glycolysis
c)		kerbs cycle
d)		Pentose phosphate pathway

3. Connecting link between glycolysis and Krebs cycle is/before entering Krebs cycle pyruvate is changed to

a)		Oxaloacetate
b)		PEP
c)		Pyruvate
d)		Acetyl CoA

4. End product of glycolysis is

a)		Acetyl CoA
b)		Pyruvic acid
c)		Glucose 1-phosphate
d)		Fructose 1-phosphate

5. Which of the following happens in mitochondria?

a)		$O_{2} + ADP + H_{3} P O_{4} \overset{M}{⟶} H_{2} O + ATP + C O_{2}$
b)		$O_{2} + ADP + H_{3} P O_{4} \overset{M}{⟶} H_{2} O + AMP + C O_{2}$
c)		${CO}_{2} + ADP + H_{3} P O_{4} \overset{M}{⟶} H_{2} O + AMP + O_{2}$
d)		${CO}_{2} + ADP + H_{3} P O_{4} \overset{M}{⟶} H_{2} O + ATP + O_{2}$

6. In glycolysis ultimately (or end product of glycolysis is)

a)		Protein is converted into glucose
b)		Glucose is converted into glycogen
c)		Starch is converted into glucose
d)		Glucose is converted into pyruvic acid

7. Complete oxidation of one gram mol. of glucose gives rise to

a)		6860,000 cal
b)		686,000 cal
c)		68,600 cal
d)		6,860 cal

8. Both respiration and photosynthesis require

a)		Sunlight
b)		Chlorophyll
c)		Glucose
d)		Cytochromes

9. The net gain of energy from one gram mole of glucose during aerobic respiration is

a)		2ATP
b)		4ATP
c)		38ATP
d)		40ATP

10. Enzymes taking part in glycolysis are present in

a)		Mitochondria
b)		Cytoplasm
c)		Both mitochondria and cytoplasm
d)		Vacuole

11. The amount of energy given by one mole of ATP is

a)		7.3 keal
b)		721 keal
c)		7600 keal
d)		1000 keal

12. The other name of glycolysis is

a)		EMP -pathway
b)		TCA -pathway
c)		HMS -pathway
d)		Carbon -pathway

13. The reactions of Krebs cycle take place

a)		In the cytoplasm
b)		In ER
c)		In matrix of mitochondria
d)		On the surface mitochondria

14. Mitochondria are sites of

a)		Oxidative phosphorylation
b)		Photolysis
c)		Phosphorylation
d)		Starch synthesis

15. Scientists awarded Nobel Prize in 1960 for tracing the path of carbon in photosynthesis was

a)		Hatch
b)		huber
c)		calvin
d)		Ruben

16. Most widely accepted theory of carbohydrate translocation is

a)		Mass flow theory
b)		Root pressure theory
c)		Imbibition theory
d)		Transpiration theory

17. Pigment system connected with oxidation of water is

a)		Photosystem I
b)		Photysystem II
c)		Phycobilisome
d)		Carotenoids

18. For fixing one molecule of ${CO}_{2}$ in Calvin cycle, are required

a)		3ATP + ${1 NADPH}_{2}$
b)		${3 ATP + 2 NADPH}_{2}$
c)		${2 ATP + 3 NADPH}_{2}$
d)		${3 ATP + 3 NADPH}_{2}$

19. Light reaction of photosynthesis is also called

a)		Calvin cycle
b)		Hill reaction
c)		TCA cycle
d)		All the above

20. Carbon dioxide is fixed in

a)		Light reaction
b)		Dark reaction
c)		Aerobic respiration
d)		Anaerobic respiration

21. Special feature of $C_{4}$ plants is

a)		Thin cuticle
b)		Multilayered epidermis
c)		Kranz anatomy
d)		Both A and B

22. Compensation point is the value of a factor where there is

a)		Beginning of photosynthesis
b)		Little photosynthesis
c)		Photosynthesis equal to rate of respiration
d)		Neither photosynthesis nor respiration

23. Which of the following have high ${CO}_{2}$ compensation point

a)		$C_{2}$ -plants
b)		$C_{3}$ -plants
c)		$C_{4}$ -plants
d)		Alpine herbs

24. Nine-tenth of all photosynthesis of world (85-90 %) is carried out by

a)		Large trees with millions of branches and leaves
b)		Algae of the ocean
c)		Chlorophyll containing ferns of the forest
d)		Scientists in the laboratories

25. The carbon dioxide acceptor in Calvin cycle/ $C_{3}$ -plants is

a)		Phospho-enol pyruvate (PEP)
b)		Ribulose 1, 5-diphosphate (RuBP)
c)		Phosphoglyceric acid (PGA)
d)		Ribulose monophosphate (RMP)

26. The first carbon dioxide acceptor in $C_{4}$ - plants is

a)		Phosphoenol-pyruvate
b)		Ribulose 1, 5-diphosphate
c)		Oxalo-acetic acid
d)		Phosphoglyceric acid

27. The isotope of carbon used extensively for studies in photosynthesis is

a)		${}^{13}C$
b)		${}^{14}C$
c)		${}^{15}C$
d)		${}^{16}C$

28. In $C_{3}$ plants first stable product of photosynthesis during dark reaction is

a)		PGA
b)		PGAL
c)		RuBP
d)		Oxalo acetic acid

29. $C_{4}$ - cycle was discovered by

a)		Hatch and Slack
b)		Calvin
c)		Hill
d)		Arnon

30. The law of limiting factors for photosynthesis was enunciated by

a)		R. Hill
b)		Calvin
c)		Krebs
d)		Blackman

31. Which one is a $C_{4}$ - plant?

a)		Papaya
b)		Pea
c)		Potato
d)		Maize/Corn

32. The process of photophosphorylation was discovered by

a)		Calvin
b)		Arnon
c)		Priestley
d)		Warburg

33. Assimilatory power produced in Hill reaction and used in Blackman's reaction refers to

a)		Generation of ATP and ${NADPH}_{2}$
b)		Reduction of ${CO}_{2}$
c)		Splitting of water
d)		Disintegration of plastids

34. The site for light reaction is

a)		Grana
b)		Stroma
c)		ER
d)		Cytoplasm

35. When cell converts light energy into chemical energy, which of the following reaction would take place

a)		ADP + iP = ATP
b)		ATP - iP = ADP
c)		AMP + iP = ADP
d)		GDP + iP = GTP

36. The first step in photosynthesis is the

a)		Joining of 3- carbon atom to form Glucose
b)		Formation of ATP
c)		Ionization of water
d)		Excitement of an electron on chlorophyll by proton of light

37. The empirical formula for chlorophyll a is

a)		$C_{35} H_{72} O_{5} N_{4} Mg$
b)		$C_{65} H_{70} O_{6} N_{4} Mg$
c)		$C_{55} H_{72} O_{5} N_{4} Mg$
d)		$C_{54} H_{70} O_{6} N_{4} Mg$

38. The oxygen in photosynthesis is released from

a)		${Co}_{2}$
b)		$H_{2} O$
c)		Carbohydrate
d)		Chlorophyll

39. Stomata of CAM plants

a)		Are always open
b)		Open during the day and close at night
c)		Open during night and close during day
d)		Never open

40. Stomata open or close due to the ion

a)		${Ca}^{2 +}$
b)		${Na}^{+}$
c)		$K^{+}$
d)		${Cu}^{+}$

41. The most widely accepted theory for ascent of sap in trees is

a)		Capillarity
b)		Role of atmospheric pressure
c)		Pulsating action of living cell
d)		Transpiration pull and cohesion theory of Dixon and Joly

42. In soil the water available for root absorption is

a)		Gravitational water
b)		Capillary water
c)		Hygroscopic water
d)		Combined water

43. Guttation is mainly due to

a)		Root pressure
b)		Osmosis
c)		Transpiration
d)		Imbibition

44. The conditions under which transpiration would be most rapid

a)		High humidity
b)		Excess of water in soil
c)		Low humidity, high temperature, guard cell are turgid (open), moist soil
d)		Low velocity of wind

45. Which is produced during water stress that brings stomatal closure

a)		Ethylene
b)		PotometersAbscisic acid
c)		Ferulic acid
d)		Coumarin

46. Which of the following is used to determine the rate of transpiration in plants?

a)		Porometer/hygrometer
b)		Potometers
c)		Auxanometer
d)		Tensiometer/Barometer

47. Osmotic pressure in a vacuolated plant cell is

a)		Equal to W.P.
b)		Equal to T.P
c)		More than D.P.D.
d)		Less than D.P.D.

48. Which is true of a fully turgid cell

a)		O.P. = D.P.D
b)		O.P. = Zero
c)		D.P.D = Zero
d)		T.P = Zero

49. A slice of Sugar Beet placed in concentrated salt solution would

a)		Become swollen
b)		Lose water and become flaccid
c)		Absorb small quantity of water
d)		Show no change

50. When a cell is fully turgid, which of the following will be zero

a)		Turgor pressure/pressure potential
b)		Wall pressure
c)		Suction pressur/DPD/water potential
d)		Osmotic pressure (solute pressure)