Function of respiration is to -

Options

A. make ATP
B. Make NADH
C. Get rid of glucose
D. Get rid of `CO_(2)`

Answer

### Step-by-Step Text Solution:

1. **Understanding Respiration**: Respiration is a vital process that occurs in all living organisms, involving both physical and chemical components.

2. **Physical Process**: The first aspect of respiration is the exchange of gases, primarily oxygen and carbon dioxide. This exchange is crucial for the continuation of the respiration process.

3. **Chemical Process**: The chemical aspect of respiration occurs after the physical gas exchange. During this phase, glucose, a six-carbon compound, is broken down through various stages.

4. **ATP Production**: The primary function of respiration is to produce ATP (adenosine triphosphate), which serves as the energy currency of the cell. ATP is generated through the breakdown of glucose into pyruvate (a three-carbon compound) and subsequently into acetyl coenzyme A (a two-carbon compound).

5. **TCA Cycle and Electron Transport Chain**: After the formation of acetyl coenzyme A, it enters the TCA cycle (Krebs cycle), leading to further breakdown and energy extraction. The electron transport chain (ETC) and oxidative phosphorylation are the final steps where NADH is converted into ATP.

6. **By-products of Respiration**: While glucose is utilized in the process, carbon dioxide is produced as a by-product of respiration, which is then expelled from the organism.

7. **Conclusion**: The main function of respiration is to produce ATP, which is essential for various cellular activities, rather than to remove glucose or carbon dioxide.