Biology Chapter 2 Entry test MCQs
26. Each photon of light excites how many electrons?
a. 2
b. 1
c. 6
d. 4
27. Water splits during photosynthesis in/on:
a. Into the stroma
b. Interior space of thylakoid
c. At ATP synthase complex
d. Outside the thylakoid membrane
28. NADP’ reductase transfers electrons from:
a. ADP to ATP
b. NADP* to ferredoxin
c. Cytochrome complex to NADP+
d. Ferredoxin to NADP+
29. Which of the following is correct sequence for the movement of electrons during non- cycling photophosphorylation?
a. Water P680-P700 NADP+
b. P680-P700-water-NADP+
c. P680-P700→NADP-water
d. Water-P700–P680-NADP+
30. Which statement is not true about the noncyclic electron pathway?
a. It produces ATP
b. It absorbs photons into PS-1
c. Carbon dioxide fixation
d. It is a long pathway
31. NADPH2 is produced in photosynthesis during:
a. Non-cyclic photophosphorylation
b. Dark reaction
c. Cyclic photophosphorylation
d. Pseudo cyclic photophosphorylation
32. Z-scheme is another name used for:
a. Non-cyclic photophosphorylation
b. Cyclic photophosphorylation
c. Oxidative phosphorylation
d. Calvin cycle
Light Independent Reactions/Dark Reaction
33. Which is not true for dark reaction?
a. Also called Z-scheme
b. Does not require light directly
c. G3P is produced
d. It uses ATP
34. The process in which carbon from CO2 is incorporated into organic molecules:
a. Krebs cycle
b. Glycolysis
c. Light dependent reactions
d. Calvin cycle
35. Which is associated with the Calvin cycle?
a. Carbon dioxide fixation
b. ATP production
c. Carbon dioxide production
d. Oxygen production
36. The product of the dark reaction is:
a. G3P
b. ATP
c. PEP
d. NADPH
37. If 12 NADPH are used in Calvin cycle, then how many glucose molecules will be formed:
a. Two
b. One
c. Twelve
d. Six
38. Calvin cycle is also known as C3 pathway due to:
a. Production of 3 carbon 3PGA
b. Initial incorporation of 3 CO2 molecules
c. Cycle has 3 steps
d. Production of 3 carbon G3p
39. For fixing 3 molecules of CO2 in Calvin cycle, what is needed?
a. 6ATP-9NADPH2
b. 9ATP-6NADPH2
c. 3ATP+3NADPH
d. 18ATP + 12NADPH2
Cellular Respiration (Types and Mechanism of Anaerobic Respiration)
40. NADH is oxidized during:
a. Lactic acid fermentation
b. Glycolysis
c. Dark reactions
d. Krebs cycle
41. Which of the following can perform anaerobic respiration?
a. Bacteria
b. Yeast
c. Skeletal muscles
d. All A, B, C
42. Amount of energy extracted from glucose molecule during respiration without oxygen is:
a. 6%
b. 4%
c. 8%
d. 2%
43. The final fate of glucose in yeast when it is deprived of oxygen:
a. Acetaldehyde
b. Lactate
c. Alcohol
d. Pyruvate
44. In cellular respiration, product formed as a result of release of energy:
a. NADH
b. ATP
c. Glucose
d. Oxygen
Mechanism of Aerobic Respiration, Glycolysis, P.A.O and Krebs cycle
45. Number of ATP molecules used during preparatory phase of glycolysis:
a. 1
b. 2
c. 6
d. 4
46. In plants, energy is released during the process of:
a. Transpiration
b. Photosynthesis
c. Water absorption
d. Respiration
47. Water is released during conversion of:
a. 1,3 bisphosphoglycerate——3-phosphoglycerate
b. 2-phosphoglycerate—PEP
c. G3P—–1.3 bisphosphoglycerate
d. 3-phosphoglycerate-2-phosphoglycerate
48. Which one of the following represents de-phosphorelytion
a. Fructose 1-phosphate—–Fructose 6-phosphate
b. Fructose 1-phosphate—– Fructase 1,6 bisphosphate
c. Glucose 6-phosphate → Fructose 1-phosphate
d. Fructose 1,3 bisphosphoglycerate—–3 phosphoglycerate
49. Gross production of ATP molecules during glycolysis is:
a. 6
b. 2
c. 8
d. 4
50. The net gain of energy from one molecule of glucose during aerobic respiration in prokaryotes is:
a. 4 ATP
b. 2 ATP
c. 40 ATP
d. 38 ATP