Question

Give an account of Calvin cycle​

Answer 1

Answer:

The Calvin cycle is part of photosynthesis, which occurs in two stages. In the first stage, chemical reactions use energy from light to produce ATP and NADPH. In the second stage (Calvin cycle or dark reactions), carbon dioxide and water are converted into organic molecules, such as glucose.

Explanation:

Answer 2

Calvin Cycle

Step by step explanation

1) It is also referred to as the C3- cycle and predominantly occurs during the dark phase of photosynthesis.

2) During this phase carbon dioxide is accepted by the RuBP (Ribulose-1,5-bisphosphate). The reaction occurs in the presence of enzyme called Rubisco (i.e. Rubp carboxylase/ oxygenase).

3) ATP and NADPH released during the Light Reaction are utilized during the process.

The entire cycles is divided into three phases:

a) Carbon Fixation: carbon dioxide combines with RuBP and forms 6 carbon intermediates. This breaks into a 3 carbon compound called phosphoglyceric acid.

b) Reduction: Phosphogyceric acid is reduced to glyceraldehyde- 3- phosphate in the presence of ATP and NADPH. Total 6 ATP and 6 NADPH takes place during the phase.

c) Regeneration of RuBP: Glyceraldehyde 3- phosphate is utilized in the regeneration of RuBP. The phase utilizes 3 ATP.

Explanation: