Which of the following hormones is not produced by the placenta?

• (A) hCG
• (B) hPL
• (C) Thyroxine
• (D) Estrogen

In the following statements, identify the stages of oogenesis in the order in which they occur:

(A) During fertilisation, formation of egg and second polar body.

(B) Meiosis II commences but stops at metaphase II.

(C) Meiosis I commences but stops at prophase I.

(D) Formation of primary oocyte from oogonia.

(E) Meiosis I completes and results in formation of secondary oocyte and first polar body.

• (A) (D), (C), (B), (E), (A)
• (B) (C), (E), (D), (A), (B)
• (C) (D), (C), (E), (B), (A)
• (D) (D), (C), (A), (E), (B)

Select the correct statement/s from the following:

A. Spermatogonia always undergo meiotic cell division.

B. Primary spermatocytes divide by mitotic cell division.

C. Secondary spermatocytes have 23 chromosomes and undergo second meiotic division.

D. Spermatozoa are transformed into spermatids.

• (A) A and C only
• (B) C only
• (C) D only
• (D) B and C only

Arrange the following events in correct sequence:

A. Formation of zygote

B. Formation of blastocyst

C. Implantation

D. Formation of morula

• (A) A, D, B, C
• (B) A, B, D, C
• (C) A, B, C, D
• (D) C, D, B, A

Which among the following hormones is not produced by placenta?

• (A) Human Chorionic Gonadotropin (hCG)
• (B) Human Placental Lactogen (hPL)
• (C) Estrogens
• (D) Relaxin

A primary spermatocyte after first meiotic division leads to the formation of secondary spermatocytes. These are:

• (A) Two equal haploid cells
• (B) Two unequal haploid cells
• (C) Two diploid cells
• (D) Four diploid cells

A pregnant female was admitted to the labour room. Mild uterine contractions started, but further strong uterine contractions were not taking place. Which of these could a doctor inject to induce delivery?

• (A) Oxytocin
• (B) Vasopressin
• (C) Relaxin
• (D) Prolactin

Spermatogenesis starts at the age of puberty due to a significant increase in secretion of Gonadotropin Releasing Hormone (GnRH). Increased levels of GnRH stimulate the secretion of two gonadotropins which are:

• (A) Luteinising Hormone and Androgens
• (B) Follicle Stimulating Hormone and Androgens
• (C) Luteinising Hormone and Follicle Stimulating Hormone
• (D) Luteinising Hormone and Testosterone

Select the correct sequence of events in human spermatogenesis:

(A) Spermatid

(B) Spermatogonia

(C) Spermatozoa

(D) Secondary Spermatocytes

(E) Primary Spermatocytes

• (A) (B), (E), (D), (A), (C)
• (B) (E), (D), (B), (C), (A)
• (C) (B), (E), (D), (C), (A)
• (D) (B), (D), (E), (A), (C)

Which of the following statements are correct about the structure of a sperm?

A. It is composed of head, thorax, neck and tail.

B. The neck region contains a lot of mitochondria.

C. The mitochondria produce energy for the movement of the tail.

D. The tail facilitates sperm motility essential for fertilization.

• (A) A and B only
• (B) B and C only
• (C) C and D only
• (D) B and D only