Answers41111de1 ECAD Fall 2026 - Q2 - NM-Biology - S1Light Independent Reactions in Photosynthesis

Lesson 5: Light Independent Reactions in Photosynthesis Answers

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1
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Check the statements about light-independent reactions in photosynthesis that are true.

A
Light-independent reactions requires carbon dioxide (CO2).
B
Light-independent reactions occur in the thylakoid membrane.
C
Light-independent reactions involve the splitting of water molecules.
D
Light-independent reactions produce carbohydrates.
2
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Check the statements about light-independent reactions in photosynthesis that are true.

A
Light-independent reactions requires carbon dioxide (CO2).
B
Light-independent reactions occur in the thylakoid membrane.
C
Light-independent reactions involve the splitting of water molecules.
D
Light-independent reactions produce carbohydrates.
3

In one to three sentences, describe what happens during the carbon fixation stage of the Calvin cycle.

Answer:

During the carbon fixation stage, carbon dioxide (CO2) from the atmosphere is attached to a five-carbon sugar called ribulose bisphosphate (RuBP). This reaction is catalyzed by the enzyme rubisco and results in the formation of two molecules of 3-phosphoglycerate (PGA).

4

What did you include in your answer?

A
Carbon dioxide (CO2) combines with a five-carbon compound
B
3-phosphoglycerate (PGA) is formed.

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Lesson 5: Light Independent Reactions in…