Practice Question
Aerobic respiration occurs in the presence of what necessary molecule?
Answer Choices:
Correct Answer:
Oxygen.
Rationale:
💎 Aerobic respiration requires oxygen to break down glucose and produce ATP efficiently.
💎 Oxygen acts as the final electron acceptor in the electron transport chain within the mitochondria.
💎 The process yields up to 36–38 ATP molecules per glucose, far more than anaerobic respiration.
💎 Without oxygen, cells shift to anaerobic respiration, producing lactic acid instead.
💎 Therefore, oxygen is the essential molecule for aerobic respiration.
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This question is from Hesi A2- 29-10-2025 which contains 218 questions.
More Questions from This Exam
Which term means a group of similar cells combined to perform a common function?
Answer Choices:
A. Organ.
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C. Organism.
D. System.
Which genetic descriptor refers to an organism's actual appearance?
Answer Choices:
A. Homozygote.
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What does the mitochondrion produce that causes it too often be called the powerhouse of the cell?
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A. Proteins.
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A. Centriole.
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What is the purpose of cellular respiration?
Answer Choices:
A. Enable fermentation.
B. Produce enzymes.
C. Obtain energy in the form of ATP.
D. Produce oxygen molecules.
Question Details
- Category: HESI A2
- Subcategory: Comprehensive HESI A2 Exam(s) Series
- Domain: Comprehensive Hesi A2~2025
- Answer Choices: 4