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how many turns of Calvin cycle yield one...

how many turns of Calvin cycle yield one molecule of glucose?

A

8

B

2

C

6

D

4

Text Solution

Verified by Experts

The correct Answer is:
C

Conversion of `CO_(2)` to simple (reduced) organic compounds is called `CO_(2)` assimilation or `CO_(2)` fixation or carbon fixation. This fixation pathway was elucidated in the early 1950s by Melvin calvin and Coworkens and is often called as calvin cycle. Since, one molecule of carbon is fixed in one turn of the calvin cycle. so, six turns of the cycle are required to fix the glucose molecules containing 6 carbon atoms.
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Based on the balanced chemical equation for photosynthesis and the complex biochemical reactions involved in the process, answer the following questions. (a) How many atoms of carbon are fixed per one molecule of glucose formed? (b) How many Calvin cycles are involved for the formation of one molecule of glucose? ( c) What is the total number of NADP and ATP required for the entire process? (d) How can six molecules of water give six oxygen molecules at the end?

Six turns of Calvin cycle are required to generate one mole of glucose. Explain.

Knowledge Check

  • If there are 12 molecules of CO_(2) to be fixed in photosynthesis, then how many turns of Calvin cycle and how many molecules of glucose will be synthesized respectively?

    A
    9 turns, 2 molecules
    B
    12 turns, 1 molecule
    C
    6 turns, 1 molecule
    D
    12 turns, 2 molecules
  • How many full turns of the Calvin cycle are required to make one molecule of glucose

    A
    one
    B
    two
    C
    four
    D
    six
  • How many Calvin cycle form one hexose molecule

    A
    2
    B
    6
    C
    4
    D
    8
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