Question

Proximal Centriole of Sperm is found in
a) Head
b) Neck
c) Middle piece
d) Tail

Answer 1

Hint: As we know that, Spermatogenesis is the process of maturation of primordial cells in the testis of male to form sperms or spermatozoa is known as spermatogenesis. As we know that, the testis is formed of numerous tubular seminiferous tubules held together with connective tissue. The spermatozoa are a single specialized cell modified for swimming and delivering its cell into the ovum to complete the act of fertilization. The sperm is very small and only a few numbers in size but has a long tail or flagella. The shape and size or structure of male gametes varies in different animals. It can be differentiated into 3 parts- Head, middle piece and tail.

Complete answer:
Option a) Head- head of the sperm is the anterior most part of sperm. Head consists of two parts: one is acrosome and another is nucleus. The acrosome of spermatozoa is derived from the Golgi complex of the spermatid. In the spermatid Golgi complex is in the spherical body consisting of vesicles and vacuoles. The nucleus contains DNA and chromosomes and proteins.
Option a is not correct.
Option b) Neck- lying immediately behind the head is the neck and before the middle piece. It consists of centriole one is proximal centriole in the depression of nucleus and does not cause any active function. Distal centriole attaches to the sperm tail starting from the tip of the middle piece.
So, option b is the correct answer.
Option c) middle piece- middle piece consist of mitochondria which provides energy to swim through the tubes to ovum. Mitochondria contain oxidative enzymes and hence it provides mobility or strength for the movement of sperm.
So, option c is not correct.
Option d) tail- tail is the longest part of spermatozoa. It consists of a thin layer of cytoplasm and an outer layer sheath of plasmalemma. Axial filament consists of a peripheral of central longitudinal fibers.
So, option d is also not correct.

Hence, Option b is the correct answer.

Note:
Gametogenesis is the process of formation of gametes. The gametes are as we know are sex cells produced inside gonads or sex organs. Gonadotrophic hormones that are follicle stimulating hormone (FSH) and luteinizing hormone (LH) of pituitary gland regulate gametogenesis. Puberty attains at the age of \[14 - 15\] in boys and \[12 - 13\] in girls, which starts the development and growth of sexual organs or gonads.