5
QuizMultiple Choice

Light Independent Reactions in Photosynthesis

Question 5 • HVA 26-27 IM Biology A

What is one role of ATP in the light-independent reaction of photosynthesis?

Answer
A
ATP supplies the energy to produce glucose and other carbohydrates.
B
ATP is produced when water molecules are split and chlorophyll electrons are excited.
C
ATP supplies the energy to split water molecules.
D
ATP produces CO2 and O2 molecules.

Explanation

In the light-independent reactions, ATP made during the light-dependent reactions provides energy for building carbohydrates from carbon dioxide. Therefore, the correct choice is “ATP supplies the energy to produce glucose and other carbohydrates.” Splitting water and exciting chlorophyll electrons occur in the light-dependent reactions, not the light-independent reactions.

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