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 1: Understand the ATP production in aerobic respiration
- In aerobic respiration, glucose undergoes glycolysis, the Krebs cycle, and the electron transport chain.
- Glycolysis produces **2 ATP**.
- The Krebs cycle produces another **2 ATP**.
- The electron transport chain produces approximately **34 ATP**.
- **Total ATP from aerobic respiration = 2 (glycolysis) + 2 (Krebs cycle) + 34 (electron transport chain) = 38 ATP**.

### Step 2: Understand the ATP production in anaerobic respiration
- In anaerobic respiration, the process primarily involves glycolysis and fermentation.
- Glycolysis still produces **2 ATP**.
- Fermentation does not produce additional ATP.
- **Total ATP from anaerobic respiration = 2 ATP**.

### Step 3: Calculate the ratio of ATP production
- To find out how many times more ATP is produced in aerobic respiration compared to anaerobic respiration, we can use the formula:

\[ \text{Ratio} = \frac{\text{ATP from aerobic respiration}}{\text{ATP from anaerobic respiration}} = \frac{38}{2} = 19 \]

### Conclusion
- Aerobic respiration produces **19 times more ATP** than anaerobic respiration.