Respiration Electron Transport Chain Quiz

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Which of the following is the primary function of the electron transport chain in aerobic respiration?

To produce NADH and FADH2 for the Krebs cycle
To generate a proton gradient that drives ATP synthase
To oxidize organic molecules and release energy
To reduce oxygen to water as the terminal electron acceptor (correct)

In anaerobic respiration, which of the following molecules can act as the terminal electron acceptor instead of oxygen?

Nitrate, iron, or sulfate (correct)
Glucose
Pyruvate
NADH

Which of the following statements about the Krebs cycle is correct?

It produces NADH and FADH2 but not ATP
It is the final step in the breakdown of glucose
It is a part of anaerobic respiration
It occurs in the mitochondrial matrix and is a crucial part of aerobic respiration (correct)

What is the primary difference between aerobic and anaerobic respiration in terms of ATP production?

Aerobic respiration produces more ATP than anaerobic respiration (A) Signup and view all the answers

Which of the following is the primary purpose of the FADH2 produced during the Krebs cycle?

To be oxidized in the electron transport chain and contribute to ATP production (C) Signup and view all the answers

In anaerobic respiration, what is the primary purpose of the terminal electron acceptor?

To regenerate NAD+ so that glycolysis can continue (A) Signup and view all the answers

What is the total theoretical ATP yield from one glucose molecule in aerobic respiration for a prokaryotic cell?

38 ATP (D) Signup and view all the answers

How many ATP molecules are generated for each FADH2 molecule in aerobic respiration?

2 ATP (D) Signup and view all the answers

Where does the Krebs Cycle occur in a eukaryotic cell?

Mitochondrial matrix (B) Signup and view all the answers

During aerobic respiration, what is the alternative final electron acceptor if oxygen is not available?

An inorganic molecule (B) Signup and view all the answers

How many NADH molecules are produced from the TCA cycle for one molecule of glucose?

8 NADH (B) Signup and view all the answers

What is the net ATP yield from glycolysis for a prokaryotic cell in aerobic respiration?

2 ATP (A) Signup and view all the answers

Which of the following is true about the Krebs cycle (TCA cycle)?

It produces 3 NADH and 1 FADH2 molecules per turn of the cycle. (C) Signup and view all the answers

What is the primary role of the electron transport chain in aerobic respiration?

To transfer electrons from NADH and FADH2 to molecular oxygen, generating a proton gradient. (C) Signup and view all the answers

During anaerobic respiration, what is the final electron acceptor?

Ethanol or lactic acid (D) Signup and view all the answers

What is the primary function of FADH2 in aerobic respiration?

To transfer electrons to the electron transport chain, generating a proton gradient. (C) Signup and view all the answers

Which of the following statements about ATP production in aerobic respiration is correct?

The majority of ATP is generated by the chemiosmotic process coupled to the electron transport chain. (B) Signup and view all the answers

What is the primary role of NADH in aerobic respiration?

To transfer electrons from glycolysis to the electron transport chain. (B) Signup and view all the answers