Q. No.Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | All mitochondria in the bodily cells of an individual normally derive from the mother alone. |
| Reason (R): | The sperm has a large number of mitochondria in the body that are spirally arranged. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Identify the correct statement:
| 1. | Sertoli cells help in spermiation |
| 2. | The sperms are stored in seminal vesicles in humans |
| 3. | Corpus Albicans secretes large amounts of progesterone |
| 4. | For normal fertility, at least 40% sperms must show vigorous motility |
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Chose the correct chronological order in which the following cells are produced:
| a. | primary spermatocytes | b. | secondary spermatocytes |
| c. | spermatids | d. | spermatogonia |
| e | sperm cells |
| 1. | a,b,c,d,e | 2. | b,a,c,e,d |
| 3. | c,a,b,d,e | 4. | d,a,b,c,e |
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A cross-section at the midpoint of the middle piece of a human sperm will show :
| 1. | centriole, mitochondria, and 9+2 arrangement of microtubules |
| 2. | centriole and mitochondria |
| 3. | mitochondria and 9+2 arrangement of microtubules |
| 4. | 9+2 arrangement of microtubules only |
Identify the cells that are haploid: (1) spermatogonia (2) primary spermatocytes (3) secondary spermatocytes (4) spermatids (5) spermatozoa
| 1. | 1, 2, and 3 | 2. | 2, 3, 4, and 5 |
| 2. | 3, 4, and 5 | 4. | 4 and 5 only |
An organelle covering the head of animal sperm and containing enzymes that digest the egg cell coating, thus permitting the sperm to enter the egg is called as:
| 1. | nebenkern | 2. | manchette |
| 3. | head | 4. | acrosome |
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In humans, the process of spermatogenesis in males and oogenesis in females are similar in:
1. Age at which the processes begin
2. The number of resultant haploid cells
3. Cytokinesis
4. Occurring in respective primary sex organs
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The process of maturation of spermatids to sperms and the cells that facilitate this process are respectively:
1. spermiogenesis; sustentacular cells
2. spematocytogenesis; spermatogonia
3. spermiation; Sertoli cells
4. spermatogenesis; interstitial cells
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Sperm-producing cells have unique antigens yet they are not attacked by the immune cells because of:
| 1. | antigens are recognized as self-antigens. |
| 2. | acrosome at the tip. |
| 3. | protection by the blood-testis barrier. |
| 4. | inhibitors attached on the surface. |
The term used to describe the changes that happen to the sperm inside the female reproductive tract that allows the sperm to become capable of fertilizing the egg is:
| 1. | spermiogenesis | 2. | the acrosomal reaction |
| 3. | capacitation | 4. | implantation |
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