Which of the following statements accurately describes the structure of a cilium or ﬂagellum?

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The core of a cilium or ﬂagellum is made up of a single microtubule surrounded by plasma membrane.

The axoneme of a cilium or ﬂagellum consists of nine pairs of peripheral microtubules and two central microtubules, arranged in a 9+2 array.

Basal bodies are not involved in the formation of cilia and ﬂagella.

Cilia and ﬂagella are solid structures without microtubules.

answer is B.

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Detailed Solution

The axoneme of cilium or flagellum is composed of microtubules arranged in a specific pattern known as the 9 + 2 arrangement. This arrangement consists of nine outer microtubule doublets surrounding a central pair of microtubules. The outer doublets are connected by dynein arms and radial spokes, which provide structural support and allow for movement.

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