Sexual Reproduction, Development and Growth

Free sample questions

Sexual Reproduction, Development and Growth — sample Biology questions with answers

1. Question 1

   Which part of the testis is responsible for producing sperm?

   • AEpididymis
   • BSeminiferous tubules
   • CVas deferens
   • DProstate gland

   Answer: B. Seminiferous tubules

   Sperm are produced in the seminiferous tubules. The epididymis stores sperm, the vas deferens transports them, and the prostate gland produces seminal fluid.

2. Question 2

   What is the role of $\text{FSH}$ hormone in males?

   • AStimulates the production of testosterone
   • BStimulates spermatogenesis
   • CCauses the formation of secondary characteristics
   • DRegulates water balance

   Answer: B. Stimulates spermatogenesis

   $\text{FSH}$ stimulates Sertoli cells to support spermatogenesis. Testosterone is stimulated by $\text{LH}$.

3. Question 3

   How many chromosomes are in a human sperm?

   • A$46$
   • B$23$
   • C$44$
   • D$22$

   Answer: B. $23$

   Sperm is haploid, with $23$ chromosomes. $46$ is diploid, $44$ is the number of autosomes in a somatic cell, and $22$ is incorrect.

4. Question 4

   The process of meiosis in spermatogenesis produces ...

   • A$1$ functional sperm
   • B$2$ sperm
   • C$4$ sperm
   • D$3$ sperm and $1$ polar body

   Answer: C. $4$ sperm

   Spermatogenesis produces $4$ functional sperm. Oogenesis produces $1$ ovum and $3$ polar bodies.

5. Question 5

   What is meant by the acrosome?

   • APart of the sperm head containing enzymes to penetrate the ovum
   • BMiddle part of the sperm containing mitochondria
   • CTail of the sperm for movement
   • DMembrane that protects the sperm

   Answer: A. Part of the sperm head containing enzymes to penetrate the ovum

   The acrosome at the tip of the sperm head contains hydrolytic enzymes such as hyaluronidase to penetrate the layers of the ovum.