Question

In photosynthesis, the electron that travels through the electron transport chain in the thylakoid membrane comes from _____ . In cellular respiration, a molecule of _____ supplies the electron that travels through the electron transport chain.

1.

A. ATP

B. Carbon Dioxide

C. Water

D. NADH


2.

A. ATP

B. Carbon Dioxide

C. Water

D. NADH
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There are two answers.

Answer 1

Hello User

Answer is: NADH.
NADH is very good electron donating agent.
I hope this helps
-Chris

Answer 2

the first one is NADH