During deficiency of oxygen in tissues of human beings , pyruvic acid is converted into lactic acid in the

Options

A. cytoplasm
B. chloroplast
C. mitochondria
D. Golgi body

Explanation

**Step-by-Step Solution:**

1. **Understanding the Context**: The question asks about the conversion of pyruvic acid to lactic acid during oxygen deficiency in human tissues. This process is part of anaerobic respiration.

2. **Glycolysis Process**: In the absence of sufficient oxygen, glucose is broken down through a process called glycolysis. This occurs in the cytoplasm of the cell, resulting in the formation of pyruvic acid (or pyruvate).

3. **Conversion of Pyruvic Acid**: When oxygen levels are low, the pyruvic acid produced from glycolysis cannot enter the aerobic respiration pathway (which occurs in the mitochondria). Instead, it is converted into lactic acid.

4. **Location of the Process**: The conversion of pyruvic acid to lactic acid occurs in the cytoplasm of the cell. This is important because it distinguishes anaerobic respiration from aerobic respiration, which occurs in the mitochondria.

5. **Formation of ATP**: During this anaerobic process, a small amount of energy is produced in the form of ATP (two molecules of ATP are formed).

6. **Final Answer**: Therefore, the correct answer to the question is that pyruvic acid is converted into lactic acid in the **cytoplasm** of the cell.

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