Question

Proximal centriole is located in which part of the sperm?

• A. Tail
• B. Acrosome
• C. Middle part
• D. In a depression of nucleus

Answer 1

The correct option is D In a depression of nucleus

Sperm is differentiated into head, middle part and tail. Head consists of nucleus carrying DNA and protein. The bowl-shaped depression of sperm nucleus (centriolar fossa) has proximal centriole. The middle part and tail of sperm have axial filament with the 9+2 arrangement of microtubules. Acrosome is a cap-like structure that covers the sperm head and contains enzymes filled vesicles. Thus, the correct answer is option D.