POSSIBLE POINTS: 1

Question

Based on the diagram, what are the products of the electron transport chain? SELECT ALL THAT APPLY.
Responses

NADH
NADH

O2
O 2

ATP
ATP

CO2
CO 2

Pyruvate
Pyruvate

H2O

Answer 1

The products of the electron transport chain (ETC) primarily include:

• ATP (as a result of oxidative phosphorylation)
• H2O (water, which is formed when electrons reduce oxygen)

The other options listed (NADH, O2, CO2, Pyruvate) are not direct products of the ETC:

• NADH is produced in earlier stages of cellular respiration (like glycolysis and the citric acid cycle).
• O2 is the final electron acceptor but is not a product.
• CO2 is produced during the citric acid cycle (not the ETC).
• Pyruvate is produced in glycolysis.

So, the correct answers are:

• ATP
• H2O