Chlorophyll a has

Options

A. (a) `-CHO` group
B. (b) `-COOH` group
C. (c) `-CH_(3)` group
D. (d) No functional group

Answer

**Step-by-Step Solution:**

1. **Understanding Chlorophyll a**: Chlorophyll a is a pigment essential for photosynthesis, primarily responsible for absorbing light energy. It is characterized by its bluish-green color.

2. **Molecular Structure**: The molecular formula of chlorophyll a is C55 H72 N4 Mg. This indicates the presence of carbon (C), hydrogen (H), nitrogen (N), and magnesium (Mg).

3. **Functional Groups**: The question asks about the functional groups present in chlorophyll a. The options given are:
- A) CHO group (aldehyde)
- B) COH group (carboxylic acid)
- C) CH3 group (methyl)
- D) No functional group

4. **Analysis of Options**:
- **CHO Group**: This is an aldehyde group. Chlorophyll a does not contain an aldehyde group.
- **COH Group**: This is a carboxylic acid group. Chlorophyll a does not contain a carboxylic acid group.
- **CH3 Group**: This is a methyl group. Chlorophyll a does contain methyl groups as part of its structure.
- **No Functional Group**: This option is incorrect as chlorophyll a does have functional groups.

5. **Conclusion**: The only functional group that chlorophyll a possesses from the given options is the CH3 (methyl) group. Therefore, the correct answer is option C.

**Final Answer**: Option C (CH3 group) is the correct answer.

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