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Multiple Choice
Which of the following statements about anaerobic respiration is FALSE?
A
Anaerobic respiration produces less ATP per glucose molecule than aerobic respiration.
B
Anaerobic respiration can occur in the absence of oxygen.
C
Anaerobic respiration uses an electron transport chain with a final electron acceptor other than oxygen.
D
Anaerobic respiration and fermentation both use oxygen as the final electron acceptor.
Verified step by step guidance
1
Step 1: Begin by understanding the concept of anaerobic respiration. Anaerobic respiration is a type of cellular respiration that occurs in the absence of oxygen. It uses an electron transport chain, but the final electron acceptor is not oxygen; it could be substances like nitrate, sulfate, or carbon dioxide.
Step 2: Compare anaerobic respiration to aerobic respiration. Aerobic respiration uses oxygen as the final electron acceptor and produces significantly more ATP per glucose molecule compared to anaerobic respiration. Anaerobic respiration is less efficient in ATP production.
Step 3: Clarify the difference between anaerobic respiration and fermentation. Fermentation does not use an electron transport chain and does not require a final electron acceptor. Instead, it relies on substrate-level phosphorylation to produce ATP and regenerates NAD+ by reducing pyruvate or its derivatives.
Step 4: Analyze the given statements. The first three statements are true: anaerobic respiration produces less ATP than aerobic respiration, can occur without oxygen, and uses an electron transport chain with a final electron acceptor other than oxygen. The last statement is false because neither anaerobic respiration nor fermentation uses oxygen as the final electron acceptor.
Step 5: Conclude that the correct answer is the statement claiming 'Anaerobic respiration and fermentation both use oxygen as the final electron acceptor,' as this contradicts the fundamental principles of both processes.