What is the purpose of the Calvin Cycle (Dark Reactions)? A. Fix carbon from car

Question

What is the purpose of the Calvin Cycle (Dark Reactions)?

A. Fix carbon from carbon dioxide into a two-carbon sugar, 2-phosphoglycolate

B. Fix carbon from carbon dioxide to produce the 3-carbon sugar, glyceraldehyde 3-phosphate

C. Add oxygen to the 4-carbon molecule, ribulose bis-phosphate

D. Generate ATP and NADPH

A. Fix carbon from carbon dioxide into a two-carbon sugar, 2-phosphoglycolate

B. Fix carbon from carbon dioxide to produce the 3-carbon sugar, glyceraldehyde 3-phosphate

C. Add oxygen to the 4-carbon molecule, ribulose bis-phosphate

D. Generate ATP and NADPH

Explanation / Answer

Answer:

B. Fix carbon from carbon dioxide to produce the 3-carbon sugar, glyceraldehyde 3-phosphate

Explation:

The first stable compound formed in Calvin cycle is 3-carbon phosphoglyceric acid (PGA). Hence it also called the C3 pathway. The 3-phosphoglyceric acid is oxidized to glyceraldehyde 3-phosphate.

A. Fix carbon from carbon dioxide into a two-carbon sugar, 2-phosphoglycolate-----It occurs in photorespiration.

Generate ATP and NADPH------It occurs in light reaction.

Ribulose bis-phsophate is five carbon molecule.

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