Major function of respiration is to produce

Options

A. `NADH(H^(+))`
B. ATP
C. Pyruvate
D. `C_(2)H_(5)OH`

Answer

**Step-by-Step Solution:**

1. **Understanding Respiration**: Respiration is a biological process that involves the exchange of gases (oxygen and carbon dioxide) and the oxidation of substrates to release energy.

2. **Identifying Substrates**: The primary substrates involved in respiration are glucose and glycogen. These compounds undergo oxidation during the process of respiration.

3. **The Process of Oxidation**: During respiration, the oxidation of these substrates leads to the breakdown of glucose and glycogen, which results in the release of energy.

4. **Energy Production**: The energy released during the oxidation of substrates is primarily stored in the form of ATP (adenosine triphosphate). ATP is often referred to as the "energy currency" of the cell because it is used to power various cellular processes.

5. **By-products of Respiration**: In addition to ATP, respiration also produces by-products such as carbon dioxide and water, especially during aerobic respiration, where oxygen is present.

6. **Conclusion**: The major function of respiration is to produce ATP, which is essential for carrying out the energy needs of the cell and the organism.

7. **Final Answer**: The correct answer to the question is that the major function of respiration is to produce ATP.

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