Out of the 6 molecules of G3P, how many molecules are used to make glucose?
Correct answer: A. 1
- A. 1
- B. 3
- C. 4
- D. 5
Explanation
In the Calvin cycle, six molecules of Glyceraldehyde 3-phosphate (G3P) are produced. Out of these, only one molecule exits the cycle and is used to synthesize glucose or other carbohydrates, such as sucrose or starch. The remaining five G3P molecules are recycled to regenerate three molecules of Ribulose bisphosphate (RuBP), which is essential for the continuation of the Calvin cycle. This is why Option A is correct. Options B, C, and D are incorrect as they suggest that more than one G3P molecule is used for glucose production, which is not the case in the Calvin cycle.
Last updated
About Cellular Respiration
Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
Practise Bioenergetics
1,378 free Bioenergetics MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
1 NADH in respiratory chain produces:
6-NADH can yield:
A marathon runner who trains at altitude increases the capacity of the blood to carry oxygen. The direct benefit to respiration is
About __________ % of photosynthesis is carried by terrestrial plants, while rest occurs in ocean, lakes, and ponds?
According to the chemiosmotic theory, ATP is synthesised when