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There is no transfer of electrons from c...

There is no transfer of electrons from cyt b to cyt c as

A

Energy is not available

B

The two are not nearby

C

Electron are transported in pairs

D

Electrons have no affinity for cyto-chromes.

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The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Electron Transport Chain (ETC)**: - The electron transport chain is a series of protein complexes and other molecules that transfer electrons from electron donors to electron acceptors via redox reactions. This process is crucial for ATP production in cellular respiration. 2. **Identifying the Cytochromes**: - In the ETC, cytochromes play a significant role in the transfer of electrons. The relevant cytochromes mentioned are cytochrome B and cytochrome C, which are part of complex III (cytochrome bc1 complex) and complex IV (cytochrome c oxidase), respectively. 3. **Examining the Position of Cytochromes**: - Cytochrome B and cytochrome C are not directly adjacent to each other in the electron transport chain. Instead, there is another cytochrome, cytochrome C1, that acts as an intermediary. 4. **Understanding the Transfer Mechanism**: - Electrons cannot be transferred directly from cytochrome B to cytochrome C due to the spatial arrangement of these cytochromes. Instead, the electrons are first transferred from cytochrome B to cytochrome C1, and then from cytochrome C1 to cytochrome C. 5. **Conclusion**: - The reason there is no direct transfer of electrons from cytochrome B to cytochrome C is that they are not located nearby; the presence of cytochrome C1 in between them necessitates the transfer to occur through this intermediary. ### Final Answer: There is no transfer of electrons from cytochrome B to cytochrome C because they are not located nearby; the electrons must be transported via cytochrome C1, which lies between them. ---
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