Question

Reactions that require CO2 take place in
A) the Calvin cycle alone
B) the light reactions alone
C) Both A & B
D) the chloroplast, but is not part of photosynthesis

Answer 1

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option B

the light reaction alone .

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Answer 2

(a) The Calvin cycle alone take place in the reaction CO2

Definition of Calvin cycle;

The Calvin Cycle is called as light independent reaction. The Carbon dioxide is converted by plants and algae from the air into sugar so that the food in the autotrophs grow itself.

Process of Calvin Cycle;

• The Calvin cycle usually takes place in photosynthesis.
• The Calvin cycle is divided into three stages or steps;

1. Carbon fixation
2. Carbon reduction
3. Regeneration of the starting molecule-

• The ATP and NADPH provides the energy fuel chemical reactions in the sugar generating process.
• While gaining energy fuel chemical reactions the plants capture sunlight. Through these sunlight they produce chemical bonds i.e ATP and NADPH.
• These energy carries molecules that take place in stroma where the Calvin cycle takes place.

Hence, the Calvin cycle relies on ATP and NADH which are the products of light independent reactions.