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Biology · CELL THE UNIT OF LIFE

हिन्दी

Consider the following statements regarding the eukaryotic cytoskeleton and motile appendages: (A) The cytoskeleton comprises microtubules, microfilaments, and intermediate filaments involved in mechanical support, motility, and cell shape maintenance. (B) Prokaryotic flagella possess a \( 9+2 \) axonemal microtubular arrangement identical to eukaryotic cilia. (C) Both cilium and flagellum emerge from a centriole-like structure known as the basal body. (D) Centrioles form the basal body of cilia and flagella, and spindle fibres that give rise to spindle apparatus during animal cell division. How many of the above statements are correct?

  1. Only three
  2. Only one
  3. Only two
  4. All four

Correct answer · Option 1

Only three

Explanation

Statements (A), (C), and (D) are correct. Statement (B) is incorrect because prokaryotic flagella are structurally completely different from eukaryotic flagella and lack the 9+2 axoneme.
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