Cytochromes are found in

Options

A. outer wall of mitochondria
B. cirstae of mitochondria
C. lysosomes
D. matrix of mitochondria

Answer

**Step-by-Step Solution:**

1. **Understanding Cytochromes**: Cytochromes are hemoproteins that contain heme groups. They play a crucial role in the electron transport chain, which is essential for ATP generation in cells.

2. **Function of Cytochromes**: Their primary function is to facilitate the transfer of electrons in the electron transport system, which ultimately leads to the production of ATP, the energy currency of the cell.

3. **Structure of Cytochromes**: These proteins can exist as monomeric proteins or as subunits of larger enzymatic complexes. An example of a cytochrome is cytochrome C.

4. **Historical Context**: Cytochromes were first described in 1884 by a scientist named MacMunn, who referred to them as respiratory pigments.

5. **Location of Cytochromes**: The specific location of cytochromes within the cell is on the cristae of mitochondria. The cristae are the inner membrane folds of the mitochondria where the electron transport chain occurs.

6. **Conclusion**: Therefore, the correct answer to the question "Cytochromes are found in" is the cristae of mitochondria.

**Final Answer**: Cytochromes are found in the cristae of mitochondria.

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