Enzymes of PPP of aerobic respiration are found in

Options

A. mitochondria
B. mitochondria and cytosol
C. cytosol
D. cytosol and E.R.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks where the enzymes of the Pentose Phosphate Pathway (PPP) of aerobic respiration are located.

2. **Identifying the Pathway**: The Pentose Phosphate Pathway is a metabolic pathway that generates NADPH and ribose 5-phosphate. NADPH is crucial for biosynthetic reactions, while ribose 5-phosphate is a precursor for nucleotide synthesis.

3. **Analyzing the Options**: The question provides several options regarding the location of the enzymes involved in the PPP:
- Option 1: Mitochondria
- Option 2: Mitochondria and Cytosol
- Option 3: Cytosol
- Option 4: Cytosol and Endoplasmic Reticulum

4. **Evaluating Each Option**:
- **Option 1 (Mitochondria)**: This option is incorrect because the enzymes of the PPP are not located in the mitochondria.
- **Option 2 (Mitochondria and Cytosol)**: This option is also incorrect for the same reason as option 1; the PPP enzymes are not found in the mitochondria.
- **Option 3 (Cytosol)**: This is the correct answer. The enzymes of the Pentose Phosphate Pathway are located in the cytosol of the cell.
- **Option 4 (Cytosol and Endoplasmic Reticulum)**: This option is incorrect because while the cytosol is correct, the endoplasmic reticulum is not a primary site for these enzymes.

5. **Conclusion**: Based on the analysis, the correct answer is that the enzymes of the Pentose Phosphate Pathway of aerobic respiration are found in the **Cytosol**.

**Final Answer**: The enzymes of the Pentose Phosphate Pathway (PPP) of aerobic respiration are found in the **Cytosol**.

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