Multiple choice

The middle part of the sperm contains

  1. centriole

  2. nucleus

  3. mitochondria

  4. proteins
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A Correct answer
Explanation

The sperm's middle piece contains the centriole (which forms the basal body of the flagellum) and mitochondria spirally wrapped around it, providing energy for motility. The nucleus is in the head, and while proteins are components of all cell parts, centriole is the specific organelle located in the middle piece that anchors the flagellum.

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