MCQ on Spermatogenesis

Spermatogenesis is the process of male gametes, often known as sperm, forming in the testes, the male reproductive organs. Each sperm (haploid, consisting of a single copy of each chromosome) is used in this process. A cell goes through the process of meiosis, which involves the replication and division of the genome two times to produce 4 haploid gametes.

Following many steps, this process proceeds in seminiferous tubules of the testes. The maturation process continues in the epididymis, where semen and glandular secretions are secreted. This process starts at puberty and continues till the person passes away.

The entire process of spermatogenesis in males is controlled by the activity of Leydig cells, the brain, and the pituitary gland. The number of these sperms reduces as people age, eventually leading to infertility.

Q1. The acrosome of the sperm is created from the

a) Mitochondria of the Spermatid

b) Golgi Complex of the Spermatid

c) Golgi Complex of the Spermatid

d) Centrosome of the Spermatid 

Answer. Golgi Complex of the Spermatid is the correct answer. 

The acrosome is an organelle that grows at the spermatozoa’s anterior end, or head. It is derived from the Golgi apparatus and has a cap-like structure. In acrosomogenesis, active trafficking of the vesicles carrying Golgi body enzymes is involved.

Q2. The process of spermatogenesis is initiated by the

a) TSH

b) ACTH

c) MSH

d) FSH

Answer. FSH is the correct answer. 

The hypothalamus produces gonadotropin-releasing hormone when a child reaches puberty (GnRH). The gonadotropic hormones follicle – Stimulating Hormone (FSH) and Luteinizing Hormone (LH) are secreted by the anterior pituitary when GnRH stimulates it (LH).

FSH and LH are both glycoproteins that rely on cyclic AMP for signalling. FSH causes Sertoli cells to produce Androgen – Binding Protein (ABP) and other spermatogenesis-related signalling molecules.

LH causes testosterone to be secreted by the interstitial cells. LH, FSH, and testosterone all increase testosterone production and spermatogenesis in some way, either directly or indirectly.

Q3. Which of these happens during Spermatogenesis?

a) Mitosis

b) Meiosis

c) Mitosis and Meiosis

d) None of the above

Answer. Mitosis and Meiosis is the correct answer. Spermatogenesis is a process of immature sperm cells forming adult sperm cells through a succession of mitotic and meiotic divisions, as well as metamorphic modifications.

Q4. Which of the below given cells is immortal?

a) Glomerular Cells

b) Cells of Pituitary

c) Somatic Cells

d) Germ Cells

Answer. The correct answer is germ cell. 

A germ cell is a cell which produces an organism’s gametes. They can acquire stem cell characteristics, such as immortality, undifferentiation, and the ability to develop into other cells.

Kidney cells, plasma cells, and brain cells, on the other hand, are differentiated cells that cannot differentiate into other types of cell and are mortal, meaning they die after a specific period of time.

Q5.  Which of the following statements is not correct about Human spermatozoa? 

a) Human spermatozoa move by using their tails.

b) Human spermatozoa contain enzymes in their head which helps in the penetration of ovum.

c) Human spermatozoa are released in large numbers after some days of abstinence.

d) Human spermatozoa at a concentration of 1 million/ml ejaculate will fertilize the ovum.

Answer. Human spermatozoa at a concentration of 1 million/ml ejaculate will fertilize the ovum is the correct answer. 

Q6. The phases of maturation involve in the spermatogenesis are

a) Formation of the Spermatids from primary spermatocytes via meiosis.

b) Growth of the spermatogonia into the primary Spermatocytes.

c) Formation of the Spermatogonia from Gonocytes via mitosis

d) Formation of the Oogonia from Spermatocytes via meiosis.

Answer.Formation of the Spermatids from primary spermatocytes via meiosis is the correct answer.

The process of spermatogenesis is the development of the male gamete, or sperms.

During the multiplication phase, the sperm mother cell conducts mitotic divisions to produce a high number of cells.

During the growth phase, some of the cells expand and form primary spermatocytes.

Meiosis occurs during the maturation phase of primary spermatocytes, resulting in the formation of four spermatids.

Q7. Actual genetic section of the sperm is

a) Middle Piece of sperm

b) Tail of sperm

c) Head of sperm

d) Acrosome of sperm

Answer. Head of sperm is the correct answer. The nucleus of the sperm, which contains chromosomes, is found in the head of sperm.

Q8. In spermatogenesis, the number of spermatozoa generated by a single primary spermatocyte is

a) 3

b) 2

c) 4

d) 8

Answer. 4 is the correct answer. In spermatogenesis, the number of spermatozoa generated by a single primary spermatocyte is 4.

Q9. Polar bodies are created during

a) Gametogenesis

b) Spermatogenesis

c) Spermateleosis

d) Oogenesis

Answer. Oogenesis is the right answer. 

When diploid cells go through meiosis and create egg cells, they can divide unevenly. The egg or ovum is the daughter cell that has most of its cytoplasm separated. Polar bodies are the tiny cells that make up the rest of the cell.

As a result, polar bodies are discovered wherein egg cells are generated, the process termed as as oogenesis.

Q10. Which of the following is a significant distinction between spermatogenesis and oogenesis?

a) Oogenesis produces one egg, whereas spermatogenesis produces two sperm.

b) Four eggs are produced during oogenesis, while eight sperm are produced during spermatogenesis.

c) Oogenesis produces one egg, whereas spermatogenesis produces four sperm.

d) During oogenesis, two eggs are produced, but spermatogenesis produces only one sperm.

Answer. Oogenesis produces one egg, whereas spermatogenesis produces four sperm is the correct answer. 

Q11. What is the duration for the occurrence of the process of spermatogenesis in adult human?

a) 96 hours

b) 3 weeks

c) 64 days

d) 22 weeks

Answer. 64 days is the correct answer. The spermatogenesis process occurs for 64 days in adult humans.

Q12. The right sequence of the cell stage in the Spermatogenesis is

a) Spermatocytes – Spermatogonia – Spermatids – Spermatozoa

b) Spermatogonia – Spermatids – Spermatozoa – Spermatocytes

c) Spermatogonia – Spermatids – Spermatozoa – Spermatocytes

d) Spermatogonia – Spermatocytes – Spermatids – Spermatozoa

Answer. Spermatogonia – Spermatocytes – Spermatids – Spermatozoa is the correct sequence of the cell stage in Spermatogenesis.