Question

where are carbons being reduced by addition of high - energy electrons?
1 g3p (3c)

Explanation:

Step1: Understand the Calvin cycle

The Calvin cycle has three main stages: carbon fixation (X), reduction (Y), and regeneration of RuBP (Z).

Step2: Analyze the reduction stage

In the reduction stage (Y) of the Calvin cycle, 3 - phosphoglycerate (formed from \(CO_2\) fixation) is reduced. This reduction involves the addition of high - energy electrons (from NADPH) and phosphate groups (from ATP). The overall reaction converts 3 - phosphoglycerate to glyceraldehyde - 3 - phosphate (G3P).

Answer:

Y