End product of anaerobic respiration is

Options

A. Phosphoglyceric acid
B. Pyruvic acid
C. Lactic acid
D. Glyceraldehyde phosphate

Answer

**Step-by-Step Solution:**

1. **Understanding Anaerobic Respiration:**
- Anaerobic respiration occurs in the absence of oxygen. It is a metabolic process that allows organisms to generate energy without oxygen.

2. **Identifying the End Product of Glycolysis:**
- The initial step in both aerobic and anaerobic respiration is glycolysis, which converts glucose into pyruvic acid (or pyruvate). This is the end product of glycolysis.

3. **Fermentation Pathways:**
- In the absence of oxygen, pyruvic acid undergoes fermentation. There are two main types of fermentation:
- **Alcoholic Fermentation:** This process converts pyruvic acid into ethyl alcohol (ethanol) and carbon dioxide (CO2).
- **Lactic Acid Fermentation:** This process converts pyruvic acid into lactic acid.

4. **Analyzing the Options:**
- The question provides four options: phosphoglyceric acid, pyruvic acid, lactic acid, and glyceraldehyde phosphate.
- **Phosphoglyceric Acid:** This is not an end product of anaerobic respiration; it is involved in the glycolysis pathway.
- **Pyruvic Acid:** This is the end product of glycolysis, not specifically of anaerobic respiration.
- **Lactic Acid:** This is produced during lactic acid fermentation, which is a type of anaerobic respiration.
- **Glyceraldehyde Phosphate:** This is also a compound in the glycolysis pathway and not an end product of anaerobic respiration.

5. **Conclusion:**
- The correct answer to the question "End product of anaerobic respiration is" is **lactic acid**.