9 + 2 array of microtubules is found in the core of

Options

A. Cilia
B. Flagella
C. Fimbriae
D. (1) & (2)

Answer

To solve the question regarding the 9 + 2 array of microtubules, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the 9 + 2 Arrangement**: The 9 + 2 arrangement refers to the structural organization of microtubules found in certain cellular structures. It consists of 9 doublet microtubules arranged in a circle around 2 central microtubules.

2. **Identify Structures with 9 + 2 Arrangement**: The 9 + 2 arrangement is characteristic of cilia and flagella. These structures are involved in movement and locomotion in various organisms.

3. **Evaluate the Options**:
- Option 1: Cilia
- Option 2: Flagella
- Option 3: Fimbriae
- Option 4: Both Cilia and Flagella

4. **Determine the Correct Answer**: Since both cilia and flagella contain the 9 + 2 arrangement of microtubules, the correct answer is option 4, which states that the 9 + 2 array is found in both cilia and flagella.

### Final Answer:
The 9 + 2 array of microtubules is found in the core of both cilia and flagella (Option 4).

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