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Vadim26
2 months ago
5

Describe the overall changes in matter that occur during the light-independent reactions. What does the plant start with and wha

t does it end with? What is the source of energy that powers this change?
Biology
1 answer:
s2008m [2.3K]2 months ago
5 0

Answer:

The light-independent reactions initiate with carbon dioxide and culminate in glyceraldehyde-3-phosphate (G3P). Energy from ATP and NADPH generated in light-dependent reactions is utilized for this process.

Explanation:

Step 1: Carbon dioxide combines with ribulose biphosphate (RBP) to create a six-carbon sugar, which quickly breaks down into two molecules of 3-phosphoglycerate (3-PGA).

CO₂ + RBP ⟶ 2 3-PGA

Step 2. A phosphate group is added to 3-PGA, forming 1,3-bisphosphoglycerate (1,3-BPG).

3-PGA + ATP ⟶ 1,3-BPG + ADP

Step 3. NADPH facilitates the reduction of 1,3-BPG to G3P.

1,3-BPG + NADPH ⟶ G3P + NADP⁺

Most of the G3P is converted back into RBP, although some exits the cycle to form glucose.

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