Nokea
Which spermatid phase (spermiogenesis) is distinguished by the presence of PAS positive granules called pro acrosomal granules?
Correct Answer: A
Rationale: The correct answer is A: Golgi phase. During the Golgi phase of spermiogenesis, the proacrosomal granules are formed from the Golgi apparatus and are PAS positive. These granules will later contribute to the formation of the acrosome in mature sperm. The other choices are incorrect because:
B: Cap phase - This phase is characterized by the formation of the acrosomal cap over the nucleus, not the proacrosomal granules.
C: Acrosome phase - This phase involves the elongation and shaping of the acrosome, not the formation of proacrosomal granules.
D: Maturation phase - This phase focuses on the final maturation and condensation of the sperm cell, not the formation of proacrosomal granules.