Which of the following is involved in the transfer of elctrons in photosynthesis ?
(a) Phytochrome
(b) Cytochrome
(c) Phytohormone
(d) Desmosome

Options

A. Phytochrome
B. Cytochorme
C. Photohormone
D. Desmosome

Answer

To determine which of the given options is involved in the transfer of electrons in photosynthesis, let's analyze each option step by step:

1. **Understanding Photosynthesis**: Photosynthesis occurs in two main phases: the light-dependent reactions and the light-independent reactions (Calvin cycle). The light-dependent reactions involve the transfer of electrons, which is crucial for the synthesis of ATP and NADPH.

2. **Analyzing the Options**:
- **(a) Phytochrome**: Phytochromes are photoreceptors that help plants detect light but are not involved in the transfer of electrons.
- **(b) Cytochrome**: Cytochromes are proteins that play a key role in the electron transport chain during photosynthesis. They facilitate the transfer of electrons from one molecule to another, making them essential for the process.
- **(c) Phytohormone**: Phytohormones are plant hormones that regulate growth and development but do not participate in electron transfer.
- **(d) Desmosome**: Desmosomes are structures that help cells adhere to one another; they are not involved in photosynthesis or electron transfer.

3. **Conclusion**: Based on the analysis, the correct answer is **(b) Cytochrome**, as it is directly involved in the transfer of electrons during the light-dependent reactions of photosynthesis.

### Final Answer:
The correct option is **(b) Cytochrome**.