Ratio of `CO_2` produced in aerobic and anaerobic respiration is

Options

A. `3:1`
B. `2:1`
C. `4:1`
D. `1:1`

Answer

To find the ratio of \( CO_2 \) produced in aerobic and anaerobic respiration, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Aerobic Respiration**:
- Aerobic respiration occurs in the presence of oxygen.
- It involves the complete oxidation of glucose (C6H12O6) to carbon dioxide (CO2) and water (H2O).
- The overall equation for aerobic respiration is:
\[ C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{Energy (ATP)} \]
- From this equation, we can see that 6 molecules of \( CO_2 \) are produced.

2. **Understand Anaerobic Respiration**:
- Anaerobic respiration occurs in the absence of oxygen.
- In plants, this process typically results in the production of ethanol and carbon dioxide from glucose.
- The overall equation for anaerobic respiration in plants is:
\[ C_6H_{12}O_6 \rightarrow 2C_2H_5OH + 2CO_2 + \text{Energy (ATP)} \]
- From this equation, we can see that 2 molecules of \( CO_2 \) are produced.

3. **Calculate the Ratio**:
- Now that we have the amounts of \( CO_2 \) produced:
- Aerobic respiration produces 6 \( CO_2 \).
- Anaerobic respiration produces 2 \( CO_2 \).
- The ratio of \( CO_2 \) produced in aerobic to anaerobic respiration is:
\[ \text{Ratio} = \frac{6 \, CO_2}{2 \, CO_2} = 3:1 \]

4. **Conclusion**:
- Therefore, the ratio of \( CO_2 \) produced in aerobic and anaerobic respiration is \( 3:1 \).

### Final Answer:
The ratio of \( CO_2 \) produced in aerobic and anaerobic respiration is **3:1**.

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