Usable energy of respiration is -

Options

A. used in charging biomolecues into activity
B. Stored as heat
C. Immediately consumed in cellular activities
D. Trapped in ATP molecules

Answer

**Step-by-Step Solution:**

1. **Understanding Usable Energy in Respiration**: Respiration in plants involves the conversion of biochemical energy from nutrients into usable energy forms. The primary usable form of energy produced during respiration is ATP (adenosine triphosphate).

2. **Identifying the Forms of Energy**: The question presents several options regarding the usable energy of respiration. We need to evaluate these options:
- **Option 1**: Energy used in charging biomolecules into activity stored as heat - This is not a direct form of energy storage.
- **Option 2**: Immediately consumed in cellular activities - This is incorrect as energy is stored before being used.
- **Option 3**: Trapped in ATP molecule - This is the correct option as ATP is the primary energy currency in cells.

3. **Conclusion**: The usable energy of respiration is stored in the form of ATP. This molecule is essential for various cellular activities and is produced during the respiration process.

4. **Additional Information**: Respiration is a physio-chemical process involving both physical (gas exchange) and chemical (ATP production) phases. The chemical phase produces ATP primarily from glucose, a 6-carbon compound.

**Final Answer**: The usable energy of respiration is stored in the form of ATP.

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