General equation for aerobic respiration is

Options

A. `6CO_2+6H_2O to C_6H_12O_6+6O_2`
B. `C_6H_12O_6+6O_2to 6CO_2+6H_2O+686` Kcal
C. `C_6H_12O_6 to 2C_2H_5OH+2CO_2+2ATP`
D. `C_22H_22O_116O_2 to 6CO_2+6H_2O+"686cal"`

Answer

### Step-by-Step Solution

1. **Understanding Aerobic Respiration**:
- Aerobic respiration is a metabolic process that occurs in the presence of oxygen. It involves the breakdown of glucose (C6H12O6) to produce energy, carbon dioxide (CO2), and water (H2O).

2. **General Equation**:
- The general equation for aerobic respiration can be represented as:
\[ C6H12O6 + 6O2 \rightarrow 6CO2 + 6H2O + \text{energy (ATP)} \]
- This equation shows that one molecule of glucose reacts with six molecules of oxygen to produce six molecules of carbon dioxide, six molecules of water, and energy.

3. **Energy Yield**:
- The energy released during aerobic respiration is approximately 686 kilocalories per mole of glucose. This energy is stored in the form of adenosine triphosphate (ATP), which is the energy currency of the cell.

4. **Breakdown Process**:
- The process of aerobic respiration involves several stages:
- **Glycolysis**: The breakdown of glucose into pyruvic acid.
- **Krebs Cycle (Citric Acid Cycle)**: Pyruvic acid is converted into acetyl CoA and enters the Krebs cycle, producing CO2 and ATP.
- **Oxidative Phosphorylation**: The final stage where the majority of ATP is produced through the electron transport chain.

5. **Conclusion**:
- The correct general equation for aerobic respiration is:
\[ C6H12O6 + 6O2 \rightarrow 6CO2 + 6H2O + 686 \text{ kcal} \]
- Therefore, the answer to the question is that the general equation for aerobic respiration is the one that shows glucose being converted into carbon dioxide and water with the release of energy.