Calvin Cycle -Multiple Choice Questions Quiz

Question 1: What is the primary function of the Calvin Cycle in photosynthesis?

(a) Absorption of sunlight
(b) Production of ATP
(c) Fixation of carbon dioxide
(d) Generation of oxygen

Question 2: In which part of the chloroplast does the Calvin Cycle take place?

(a) Thylakoid membrane
(b) Grana
(c) Stroma
(d) Chlorophyll

Question 3: What is the primary energy carrier used in the Calvin Cycle?

(a) NADPH
(b) ATP
(c) Chlorophyll
(d) Carbon dioxide

Question 4: What is the initial acceptor molecule for carbon dioxide in the Calvin Cycle?

(a) Glucose
(b) RuBP (Ribulose-1,5-bisphosphate)
(c) PGA (Phosphoglyceric aci
(d)

Question 5: How many molecules of PGA (Phosphoglyceric acid) are produced after one turn of the Calvin Cycle?

(a) 1
(b) 2
(c) 3
(d) 6

Question 6: During the Calvin Cycle, PGA (Phosphoglyceric acid) is converted into a 3-carbon sugar. What is the name of this sugar?

(a) Glucose
(b) G3P (Glyceraldehyde-3-phosphate)
(c) Ribulose
(d) Fructose

Question 7: What is the enzyme responsible for carbon fixation during the Calvin Cycle?

(a) Rubisco (Ribulose-1,5-bisphosphate carboxylase/oxygenase)
(b) ATP synthase
(c) Cytochrome b6f
(d) NADPH reductase

Question 8: What molecule provides the phosphate group required to convert PGA into G3P during the Calvin Cycle?

(a) NADPH
(b) ATP
(c) Rubisco
(d) Chlorophyll

Question 9: What is the fate of G3P (Glyceraldehyde-3-phosphate) produced in the Calvin Cycle?

(a) Used to synthesize ATP
(b) Converted into glucose and other carbohydrates
(c) Released as oxygen gas
(d) Transported to the thylakoid membrane

Question 10: How many turns of the Calvin Cycle are required to produce one molecule of glucose?

(a) 1
(b) 2
(c) 3
(d) 6

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Total score: /10

Answer key:

Question 1: c

Question 2: c

Question 3: a

Question 4: b

Question 5: b

Question 6: b

Question 7: a

Question 8: b

Question 9: b

Question 10: d