Select the statement which is not related to fermentation

Options

A. It accounts for only a partial breakdown of glucose
B. It gives only 2ATP as net for glucose degradation upto pyruvic acid
C. NADH is oxidized slowly as compared to aerobic respiration
D. ETS gives 11ATP for each Krebs cycle

Answer

To solve the question, "Select the statement which is not related to fermentation," we will analyze each option provided and determine which one does not pertain to the fermentation process.

### Step-by-Step Solution:

1. **Understanding Fermentation**:
- Fermentation is a metabolic process that occurs in the absence of oxygen (anaerobic respiration). It involves the breakdown of glucose to produce energy, typically resulting in products like ethanol or lactic acid.

2. **Analyzing the Statements**:
- We need to evaluate each statement to see if it relates to fermentation or not.

3. **Statement 1**: "It accounts for only a partial breakdown of glucose molecule."
- This statement is **correct**. Fermentation does involve only a partial breakdown of glucose, leading to products like ethanol or lactic acid.

4. **Statement 2**: "It gives only 2 ATP as net for glucose degradation up to pyruvic acid."
- This statement is also **correct**. In fermentation, the net gain of ATP from glucose degradation is indeed 2 ATP.

5. **Statement 3**: "NADH is oxidized slowly as compared to the aerobic respiration."
- This statement is **correct** as well. In fermentation, NADH is oxidized at a slower rate compared to aerobic respiration, where oxygen is present.

6. **Statement 4**: "The ETC or electron transport system gives 11 ATP for each Krebs cycle."
- This statement is **not related** to fermentation. The electron transport chain (ETC) and Krebs cycle are part of aerobic respiration, not fermentation.

7. **Conclusion**:
- The statement that is not related to fermentation is the fourth one: "The ETC or electron transport system gives 11 ATP for each Krebs cycle."

### Final Answer:
The statement which is not related to fermentation is: **"The ETC or electron transport system gives 11 ATP for each Krebs cycle."**

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