Cytochrome oxidase is related with

Options

A. Cyt b
B. Cyt `a_3`
C. Cyt `c_1`
D. Cyt. c

Answer

**Step-by-Step Solution:**

1. **Understanding Cytochrome Oxidase**: Cytochrome oxidase, also known as complex IV, is a crucial enzyme in the electron transport chain (ETC) of cellular respiration. It is the final enzyme that facilitates the transfer of electrons to molecular oxygen.

2. **Location of Cytochrome Oxidase**: This enzyme is located in the inner mitochondrial membrane of eukaryotic cells and in the plasma membrane of aerobic prokaryotes. It plays a vital role in aerobic respiration.

3. **Identifying Related Cytochromes**: The question asks which cytochrome is related to cytochrome oxidase. The options provided are:
- Cytochrome B
- Cytochrome A3
- Cytochrome C1
- Cytochrome C

4. **Analyzing the Options**:
- **Cytochrome B**: This is part of complex III, not IV, so it is not related to cytochrome oxidase.
- **Cytochrome A3**: This is a component of complex IV (cytochrome oxidase) along with cytochrome A. Therefore, this is a potential correct answer.
- **Cytochrome C1**: This is part of the cytochrome b-c1 complex (complex III) and is not related to cytochrome oxidase.
- **Cytochrome C**: This is involved in the electron transport chain but is not directly related to cytochrome oxidase.

5. **Conclusion**: Based on the analysis, cytochrome oxidase is directly related to cytochrome A3, making option B the correct answer.

**Final Answer**: Cytochrome oxidase is related to **cytochrome A3** (Option B).

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