Question

The Calvin cycle

• A. takes only in light
• B. taken place only in darkness
• C. is light dependent
• D. is light independent

Answer 1

The correct option is D

is light independent

Calvin cycle

It is a pathway in which 3- carbon acid is produced which is known as 3- phosphoglyceric acid (PGA) in carbon dioxide fixation as a first product. Hence, this pathway is considered as Calvin cycle.

It occurs in three steps:-

• The first step is carboxylation (a reaction in which carboxylic acid is produced)
• The second step is reduction (molecules are converted to glucose)
• The third step is regeneration (RUBP is regenerated in this)

The Calvin cycle is light-independent.