The size of chlorophyll molecule is

Options

A. head `15xx15`Å tail 25Å
B. head `20xx20`Å, tail 25 Å
C. head `15xx15` Å, tail 20 Å
D. head `10xx12` Å, tail 15Å

Explanation

To determine the size of the chlorophyll molecule, we need to understand its structure, which consists of two main components: the porphyrin ring and the phytol tail.

### Step-by-Step Solution:

1. **Identify the Components of Chlorophyll**:
- Chlorophyll consists of a porphyrin ring (the head) and a phytol chain (the tail).

2. **Measure the Porphyrin Ring**:
- The porphyrin ring, which is the head of the chlorophyll molecule, has dimensions of 15 Å x 15 Å (Angstroms).

3. **Measure the Phytol Tail**:
- The phytol tail, which is the tail of the chlorophyll molecule, has a length of 20 Å.

4. **Combine the Measurements**:
- Therefore, the complete size of the chlorophyll molecule can be described as:
- Head: 15 Å x 15 Å
- Tail: 20 Å

5. **Select the Correct Option**:
- Based on the given options, the correct choice that matches our measurements is:
- Option C: Head 15 Å x 15 Å and Tail 20 Å.

### Final Answer:
The size of the chlorophyll molecule is: **Head 15 Å x 15 Å and Tail 20 Å (Option C).**

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