Enzymatic machinery required for partial breakdown of glucose into two molecules of pyruvic acid without the involvement of oxygen is present in

Options

A. Aerobic prokaryotes only
B. Anaerobic prokaryotes only
C. Anaerobic prokaryotes and eukaryotes only
D. All aerobic and anaerobic organisms

Answer

To answer the question regarding the enzymatic machinery required for the partial breakdown of glucose into two molecules of pyruvic acid without the involvement of oxygen, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Process**: The question refers to the partial breakdown of glucose into pyruvic acid. This process is known as glycolysis.

2. **Identifying Glycolysis**: Glycolysis is a metabolic pathway that converts glucose into two molecules of pyruvic acid. Importantly, this process does not require oxygen, making it an anaerobic process.

3. **Location of Glycolysis**: Glycolysis occurs in the cytoplasm of both prokaryotic and eukaryotic cells. This means that all organisms, whether they are prokaryotes (like bacteria) or eukaryotes (like plants and animals), can perform glycolysis.

4. **Considering the Options**: The options given in the question include:
- Aerobic prokaryotes only
- Anaerobic prokaryotes only
- Anaerobic prokaryotes and eukaryotes
- All anaerobic and aerobic organisms

5. **Selecting the Correct Answer**: Since glycolysis occurs in all types of organisms (both prokaryotic and eukaryotic) and does not require oxygen, the correct answer is "all anaerobic and aerobic organisms."

### Final Answer:
The enzymatic machinery required for the partial breakdown of glucose into two molecules of pyruvic acid without the involvement of oxygen is present in **all anaerobic and aerobic organisms**.

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