Question

The Calvin cycle in plants is responsible for the reduction of CO2 for synthesis of

a) Amino acids
b) Nucleotides
c) Hexose sugars
d) Cellulose
e) Urea

Answer 1

Option c) Hexose sugar

Step-by-step explanation:

The Calvin cycle is carried out in three stages:

• First stage includes carbon dioxide fixation with the help of 1,5-bisphosphate and ribulose
• Second stage includes the synthesis of Hexose sugar by reducing carbon dioxide
• Third stage includes the regeneration of 1,5-bisphosphate and ribulose.

The carbon dioxide molecule reacts with 1,5-bisphosphate and ribulose leading to the formation of an unstable compound of six-carbon, which is further rapidly hydrolyzed to generate two 3-phosphoglycerate molecules.

Other ways of synthesizing hexose sugars by reducing Carbon dioxide in the photosynthetic world is the reverse mode of citric acid cycle running.