Which microtubule or subfibre of the triplet disappears while passing through basal plate

Options

A. C
B. A
C. B
D. None of the above

Answer

To answer the question about which microtubule or subfibre of the triplet disappears while passing through the basal plate, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding Microtubules**: Microtubules are structural components of the cell, forming part of the cytoskeleton. They are made up of tubulin proteins and are crucial for various cellular functions, including maintaining cell shape, enabling cell motility, and facilitating intracellular transport.

2. **Triplet Structure**: In the context of cilia and flagella, microtubules are organized into a structure known as the "axoneme," which typically consists of nine outer doublet microtubules and two central microtubules (9+2 arrangement). However, in the basal body, which anchors the cilia or flagella, the microtubules are arranged in triplets.

3. **Basal Plate**: The basal plate is the structure at the base of cilia and flagella that anchors the microtubule arrangement. As the cilia or flagella grow and mature, certain microtubules may be lost or modified.

4. **Identifying the Disappearing Microtubule**: In the triplet arrangement of microtubules (A, B, and C), it is known that during the transition through the basal plate, one of these microtubules is typically lost.

5. **Conclusion**: Based on the information provided, it is specifically the microtubule C that disappears while passing through the basal plate. Therefore, the answer to the question is option C.

### Final Answer:
The microtubule that disappears while passing through the basal plate is **C**.

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