In aerobic respiration , how many times more ATP is produced than anaerobic respiration

Options

A. 10
B. 19
C. 3
D. 20

Answer

To determine how many times more ATP is produced in aerobic respiration compared to anaerobic respiration, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Aerobic Respiration**:
- Aerobic respiration occurs in the presence of oxygen.
- The end products are carbon dioxide, water, and energy in the form of ATP.
- In aerobic respiration, a total of **38 molecules of ATP** are produced.

2. **Understand Anaerobic Respiration**:
- Anaerobic respiration occurs in the absence of oxygen.
- In yeast, the products are ethanol and carbon dioxide, and it produces **2 molecules of ATP**.
- In muscle cells, the product is lactic acid, and it also produces **2 molecules of ATP**.

3. **Compare ATP Production**:
- We need to compare the ATP produced in both types of respiration.
- Aerobic respiration produces **38 ATP**.
- Anaerobic respiration produces **2 ATP**.

4. **Calculate the Ratio**:
- To find out how many times more ATP is produced in aerobic respiration compared to anaerobic respiration, we divide the amount of ATP from aerobic respiration by the amount from anaerobic respiration:
\[ \text{Ratio} = \frac{\text{ATP from Aerobic Respiration}}{\text{ATP from Anaerobic Respiration}} = \frac{38}{2} = 19 \]

5. **Conclusion**:
- Therefore, aerobic respiration produces **19 times more ATP** than anaerobic respiration.

### Final Answer:
Aerobic respiration produces **19 times more ATP** than anaerobic respiration.

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