MCQOPTIONS
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MCQOPTIONS
This section includes 43 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Gestation period in human beings is about [BHU 1982, 85] |
| A. | 10 weeks |
| B. | 28 weeks |
| C. | 32 weeks |
| D. | 36 weeks |
| Answer» E. | |
| 2. |
Ovulation in mammals refers to |
| A. | Release of ovum from ovary |
| B. | Formation of primary oocyte in ovary |
| C. | Degeneration of unfertilized ovum |
| D. | Fertilization of mature ovum |
| Answer» B. Formation of primary oocyte in ovary | |
| 3. |
What is true in the process of fertilization [MP PMT 1990; KCET 1994] |
| A. | Only one sperm reaches the egg and enters it |
| B. | The entry of sperm activates the egg for completing meiosis |
| C. | Two haploid nuclei fuse and immediately divide to produce two nuclei which are again haploid |
| D. | Only the acrosome of the sperm enters the egg |
| Answer» C. Two haploid nuclei fuse and immediately divide to produce two nuclei which are again haploid | |
| 4. |
Fertilization is depicted by the condition [DPMT 2003] |
| A. | \[n\to 2n\] |
| B. | \[2n\to 3n\] |
| C. | \[2n\to 4n\] |
| D. | \[4n\to 8n\] |
| Answer» B. \[2n\to 3n\] | |
| 5. |
One of the minute cell which separates from the animal egg during maturation is known as [CPMT 1986, 90] |
| A. | Primary spermatogonia |
| B. | Secondary oogonia |
| C. | Primary oogonia |
| D. | Polar bodies |
| Answer» E. | |
| 6. |
In eggs which have very thick and resistant membrane e.g., fishes and insects sperm penetrate through a special canal called |
| A. | Vitelline membrane |
| B. | Jelly coat |
| C. | Polar body |
| D. | Micropyle |
| Answer» E. | |
| 7. |
Which type of stimulus is used to achieve parthenogenic development |
| A. | Chemical |
| B. | Change in \[pH\] |
| C. | Pricking with microneedle |
| D. | All the above |
| Answer» E. | |
| 8. |
The fertilization membrane during fertilization is synthesized by [RPMT 2000] |
| A. | Mitochondria |
| B. | Golgi bodies |
| C. | Acid mucopolysaccharides of cortical granules |
| D. | All the above |
| Answer» D. All the above | |
| 9. |
On fertilization of egg nucleus with sperm nucleus [CPMT 1993] |
| A. | First maturation is completed |
| B. | Second maturation is completed |
| C. | Embryo is formed |
| D. | First polar body is formed |
| Answer» D. First polar body is formed | |
| 10. |
In man sperms move after ejaculation at a rate of nearly [CBSE PMT 1991] |
| A. | 2 to 4 mm/minute |
| B. | 2 to 4 feet/minute |
| C. | 2 to 4 inches/minute |
| D. | 2 to 4 cm/minute |
| Answer» B. 2 to 4 feet/minute | |
| 11. |
In human females ova are produced in [HP PMT 2005] |
| A. | Ovarian follicles |
| B. | Oviduct |
| C. | Uterus |
| D. | Vagina |
| Answer» B. Oviduct | |
| 12. |
The layer of cells immediately surrounding the ovum but outside the zona pellucida is called [CPMT 1987] |
| A. | Corona radiata |
| B. | Membrana granulosa |
| C. | Theca interna |
| D. | Germinal epithelium |
| Answer» B. Membrana granulosa | |
| 13. |
Sequence of hormones during menstrual cycle is [Orissa JEE 2004] |
| A. | Oestrogen, progesterone and FSH |
| B. | Progesterone, oestrogen and FSH |
| C. | FSH, oestrogen and progesterone |
| D. | FSH, progesterone and oestrogen |
| Answer» D. FSH, progesterone and oestrogen | |
| 14. |
In human females at the time of birth there are two million ova: how many of them normally reach maturity in the course of normal reproductive life [MP PMT 2001] |
| A. | 500 |
| B. | 1000 |
| C. | 2000 |
| D. | 5000 |
| Answer» B. 1000 | |
| 15. |
The endometrium is the lining of [CPMT 1988] |
| A. | Bladder |
| B. | Vagina |
| C. | Uterus |
| D. | Oviduct |
| Answer» D. Oviduct | |
| 16. |
The menstrual cycle in normal adult woman is of [MP PMT 1997] |
| A. | 48 days |
| B. | 38 days |
| C. | 18 days |
| D. | 28 days |
| Answer» E. | |
| 17. |
Note the relationship between the first two words and suggest a suitable word for the fourth place Mesovarium : Ovary :: Mesometrium : ............. |
| A. | Clitoris |
| B. | Uterus |
| C. | Testis |
| D. | Penis |
| Answer» C. Testis | |
| 18. |
The structure which attaches the ovaries with the dorsal wall is known as |
| A. | Wolffian body |
| B. | Mesovarium |
| C. | Mesorchium |
| D. | Fimbricated body |
| Answer» C. Mesorchium | |
| 19. |
In early haemopoietic tissue of embryo, there is |
| A. | Chorion |
| B. | Amnion |
| C. | Allantois |
| D. | Yolk sac |
| Answer» E. | |
| 20. |
Mammalian embryo is directly surrounded by |
| A. | Amniotic cavity |
| B. | Allantoic cavity |
| C. | Primary digestive cavity |
| D. | Yolk sac cavity |
| Answer» B. Allantoic cavity | |
| 21. |
A hatching egg of chick is covered by plaster of paris. It is harmful for [AFMC 1983] |
| A. | Mother |
| B. | Respiration |
| C. | Excretion |
| D. | None of these |
| Answer» C. Excretion | |
| 22. |
Foetal membranes provide [MP PMT 1993] |
| A. | Protection to embryo |
| B. | Nutrition to embryo |
| C. | Protection and nutrition to embryo |
| D. | None of these |
| Answer» D. None of these | |
| 23. |
Correct sequence in embryonic development of frog is [BCECE 2005] |
| A. | Zygotes ®Cleavage®Blastula®Gastrula |
| B. | Zygotes ®Cleavage®Gastrula®Blastula |
| C. | Cleavage®Zygotes®Blastula®Gastrula |
| D. | Zygotes ® Blastula®Cleavage®Gastrula |
| Answer» B. Zygotes ®Cleavage®Gastrula®Blastula | |
| 24. |
The permeability of the human placenta to macro-molecules is evidenced by the presence of following in foetal blood [AIIMS 1985] |
| A. | Globulin |
| B. | Albumin |
| C. | Anti Rh factor |
| D. | None of the above |
| Answer» D. None of the above | |
| 25. |
During the development of embryo which of the following occur first [AFMC 1995] |
| A. | Differentiation of tissue |
| B. | Differentiation of cells |
| C. | Differentiation of organs |
| D. | Differentiation of organ system |
| Answer» C. Differentiation of organs | |
| 26. |
Relative sizes of an egg cell, morula, blastula and gastrula are [CPMT 1993] |
| A. | Egg cell is largest and morula is smallest |
| B. | Egg cell is smallest and gastrula is largest |
| C. | Egg cell is largest and gastrula is smallest |
| D. | All are of equal size |
| Answer» E. | |
| 27. |
True coelom develops as a split in [CBSE PMT 1990; RPMT 1995; J & K CET 2002] |
| A. | Mesoderm |
| B. | Endoderm |
| C. | Ectoderm |
| D. | Between ectoderm and endoderm |
| Answer» B. Endoderm | |
| 28. |
When centrolecithal egg of the insects divides regularly then what will happen [RPMT 2001] |
| A. | Cells surround the yolk |
| B. | Yolk surround the cells |
| C. | Yolk lie below the group of cells |
| D. | Yolk lie above the group of cells |
| Answer» B. Yolk surround the cells | |
| 29. |
Which of the following is not evident that the pattern of cleavage is determined by factors in the egg cytoplasm rather than by genes of zygote |
| A. | Cleavage is prevented by injection of a protein synthesis inhibitor |
| B. | Cleavage is not affected by injection of inhibitors of RNA synthesis into the zygote |
| C. | Interspecific hybrid zygotes go through normal cleavag but die at the beginning of gastrulation |
| D. | The direction of the first division of cleavage in the snail Cepaea is determined by the mothers genotype |
| Answer» B. Cleavage is not affected by injection of inhibitors of RNA synthesis into the zygote | |
| 30. |
During the fourth and sixth cleavage of the zygote [AIIMS 1993] |
| A. | Mesomeres give rise to endoderm |
| B. | Micromeres give rise to ectoderm |
| C. | Mesomeres give rise to mesoderm |
| D. | Macromeres give rise to ectoderm |
| Answer» C. Mesomeres give rise to mesoderm | |
| 31. |
Which of the following statement is not correct |
| A. | Fertilizin of one species of animal will react with antifertilizin of another species |
| B. | Fertilizin of one species of animal will react with the antifertilizin of the same species |
| C. | Fertilizin is a glycoprotein and antifertilizins are acid proteins |
| D. | Molecular weight of fertilizin is about 3,00,000 and antifertilizin 10,000 |
| Answer» B. Fertilizin of one species of animal will react with the antifertilizin of the same species | |
| 32. |
Onset of menstruation is due to [DPMT 2003] |
| A. | Fall in level of progesterone |
| B. | Increase in level of progesterone |
| C. | Increase in level of FSH |
| D. | None of these |
| Answer» B. Increase in level of progesterone | |
| 33. |
Ovulation occurs |
| A. | Alternately from two ovaries |
| B. | Simultaneously from both the ovaries |
| C. | From one ovary alone throughout the life |
| D. | According to the season from two ovaries |
| Answer» B. Simultaneously from both the ovaries | |
| 34. |
Eggs having yolk in their centre of cytoplasm in peripheral layer are called [AIIMS 1998] |
| A. | Isolecithal |
| B. | Microlecithal |
| C. | Centrolecithal |
| D. | Telolecithal |
| Answer» D. Telolecithal | |
| 35. |
Microlecithal eggs are found in [RPMT 2001; MP PMT 2003] |
| A. | Reptilia + Aves |
| B. | Amphibia + Aves + Reptilia |
| C. | Reptilia + Aves + Chiroptera |
| D. | Eutheria |
| Answer» E. | |
| 36. |
Cleavage of frog is [MP PMT 1998] |
| A. | Holoblastic |
| B. | Meroblastic |
| C. | Superficial |
| D. | None of them |
| Answer» B. Meroblastic | |
| 37. |
The cleavage having incomplete division of egg is known as [MP PMT 1996, 99] |
| A. | Holoblastic |
| B. | Meroblastic |
| C. | Meridional |
| D. | Spiral |
| Answer» C. Meridional | |
| 38. |
When the cleavage furrow extends from animal pole to vegetal pole and does not bisects the egg equally into two blastomeres the plane of cleavage is |
| A. | Meridional |
| B. | Equatorial |
| C. | Latitudinal |
| D. | Vertical |
| Answer» E. | |
| 39. |
Cleavage is found in [RPMT 1995] |
| A. | Zygote |
| B. | Eggs |
| C. | Undivided cell |
| D. | After gastrula stage |
| Answer» B. Eggs | |
| 40. |
If the first cleavage furrow divides the zygote completely into two, the cleavage type is [MP PMT 1992] |
| A. | Radial |
| B. | Equatorial |
| C. | Meroblastic |
| D. | Holoblastic |
| Answer» E. | |
| 41. |
The ratio of the nucleus to cytoplasm at the beginning of cleavage is |
| A. | Very low |
| B. | Very high |
| C. | Normal |
| D. | A bit higher than the normal |
| Answer» B. Very high | |
| 42. |
Epibolyis the process of [CBSE PMT 1992] |
| A. | Mass migration of cells from theanimal hemisphere so that upper micromeres begin to migrate over theedge of the dorsal lip and roll inside and are tucked beneath the outer layer |
| B. | Over growth when the micromeres divide rapidly and begin to spread downwards over the megameres except at the yolk plug |
| C. | Rotation of gastrula within the vitelline membrane so that the animal pole becomes anterior |
| D. | Formation of a small slit like invagination occuring on the gray crescent |
| Answer» C. Rotation of gastrula within the vitelline membrane so that the animal pole becomes anterior | |
| 43. |
Massive amount of yolk present in the vegetal region of the egg, makes an egg [AMU 1989] |
| A. | Oligolecithal |
| B. | Mesolecithal |
| C. | Telolecithal |
| D. | Centrolecithal |
| Answer» D. Centrolecithal | |