In cellular respiration, electron carriers play a critical role in transporting electrons through metabolic pathways, particularly in the processes of glycolysis, the citric acid cycle, and oxidative phosphorylation.

Among the options provided:

1. **Cytochrome** - These are proteins that transfer electrons in the electron transport chain but are not directly used as electron carriers in earlier steps.
2. **Pyruvate** - This is a product of glycolysis and does not carry electrons.
3. **Glucose** - This is the primary fuel molecule that is broken down during cellular respiration, not an electron carrier.
4. **NADH** - This is a well-known electron carrier that transports electrons to the electron transport chain after being reduced from NAD⁺ during glycolysis and the citric acid cycle.
5. **Acetyl CoA** - This is a key metabolite that enters the citric acid cycle but does not serve as an electron carrier.

### Final Answer
The correct answer is **NADH**, as it serves as an electron carrier during cellular respiration.

Question

In cellular respiration, electron carriers play a critical role in transporting electrons through metabolic pathways, particularly in the processes of glycolysis, the citric acid cycle, and oxidative phosphorylation.

Among the options provided:

1. **Cytochrome** - These are proteins that transfer electrons in the electron transport chain but are not directly used as electron carriers in earlier steps.
2. **Pyruvate** - This is a product of glycolysis and does not carry electrons.
3. **Glucose** - This is the primary fuel molecule that is broken down during cellular respiration, not an electron carrier.
4. **NADH** - This is a well-known electron carrier that transports electrons to the electron transport chain after being reduced from NAD⁺ during glycolysis and the citric acid cycle.
5. **Acetyl CoA** - This is a key metabolite that enters the citric acid cycle but does not serve as an electron carrier.

### Final Answer
The correct answer is **NADH**, as it serves as an electron carrier during cellular respiration.

Knowee AI · Accepted Answer

In cellular respiration, electron carriers play a critical role in transporting electrons through metabolic pathways, particularly in the processes of glycolysis, the citric acid cycle, and oxidative phosphorylation.

Among the options provided:

1. **Cytochrome** - These are proteins that transfer electrons in the electron transport chain but are not directly used as electron carriers in earlier steps.
2. **Pyruvate** - This is a product of glycolysis and does not carry electrons.
3. **Glucose** - This is the primary fuel molecule that is broken down during cellular respiration, not an electron carrier.
4. **NADH** - This is a well-known electron carrier that transports electrons to the electron transport chain after being reduced from NAD⁺ during glycolysis and the citric acid cycle.
5. **Acetyl CoA** - This is a key metabolite that enters the citric acid cycle but does not serve as an electron carrier.

### Final Answer
The correct answer is **NADH**, as it serves as an electron carrier during cellular respiration.

Which serves as an electron carrier during cellular respiration.Group of answer choicescytochromepyruvateglucoseNADHacetyl CoANext

Question

Which serves as an electron carrier during cellular respiration?

Solution

Final Answer

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