MCQOPTIONS
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MCQOPTIONS
This section includes 200 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Spirochaete, treponema pallidum causes |
| A. | gonorrhoa |
| B. | syphilis |
| C. | genital herpes |
| D. | acquired immune deficiency syndrome (AIDS) |
| Answer» C. genital herpes | |
| 102. |
Artificial mode of reproduction in plants is |
| A. | layering |
| B. | grafting |
| C. | budding |
| D. | all of the above |
| Answer» E. | |
| 103. |
In hone bees, male or drones develop from |
| A. | fertilized egg |
| B. | sperm |
| C. | unfertilized egg |
| D. | embyo |
| Answer» D. embyo | |
| 104. |
Evolution of pollen tube is an important step in land adaptation by |
| A. | spermatophytes |
| B. | bryophytes |
| C. | cycadophyta |
| D. | pinophyta |
| Answer» B. bryophytes | |
| 105. |
The passing out of placenta after birth is called |
| A. | after birth |
| B. | break down |
| C. | birth release |
| D. | birth exit |
| Answer» B. break down | |
| 106. |
Asexual reproduction commonly occurs in |
| A. | plants |
| B. | less differentiated animals |
| C. | micro organisms |
| D. | all of the above |
| Answer» E. | |
| 107. |
In honey bee males are haploid and produce sperms by |
| A. | meiosis |
| B. | budding |
| C. | mitosis |
| D. | none of above |
| Answer» D. none of above | |
| 108. |
Phytochrome p660 absorbs red light at a wave length of |
| A. | 330nm |
| B. | 440nm |
| C. | 660nm |
| D. | 550nm |
| Answer» D. 550nm | |
| 109. |
Parthenocarpy occurs due to harmonal imbalance usually due to high level of |
| A. | ethene in ovaries |
| B. | auxin in ovaries |
| C. | gibberellin in ovaries |
| D. | cytokinin in ovaries |
| Answer» C. gibberellin in ovaries | |
| 110. |
Cloning has been used for desirable animals such as |
| A. | race horses |
| B. | prize bulls |
| C. | human |
| D. | both a and b |
| Answer» E. | |
| 111. |
In oestrous cycle the hormone that prepares the uterus for conception is |
| A. | testosterone |
| B. | androgen |
| C. | estrogen |
| D. | thyroxine |
| Answer» D. thyroxine | |
| 112. |
The average age of menupause for females is |
| A. | 30 years |
| B. | 41 years |
| C. | 51 years |
| D. | 60 years |
| Answer» D. 60 years | |
| 113. |
Fruit ripening is often accompanied by a burst of respiratory activity called |
| A. | climacteric |
| B. | oxidation |
| C. | reduction |
| D. | bursting |
| Answer» B. oxidation | |
| 114. |
For flowering of plants the most critical factor is |
| A. | length of the dark period |
| B. | length of the day |
| C. | length of exposure to light |
| D. | length of exposure to red light |
| Answer» B. length of the day | |
| 115. |
If the two gametes uniting are different in size and structure they are called |
| A. | heterogametes |
| B. | anisogamete |
| C. | isogamete |
| D. | both a and b |
| Answer» E. | |
| 116. |
Organisms having both the sexes are known as |
| A. | bisexual organisms |
| B. | hermaphrodites |
| C. | unisexual organisms |
| D. | both a and b |
| Answer» E. | |
| 117. |
Primary oocytes divide meiotically into |
| A. | haploid secondary oocyte |
| B. | polar body |
| C. | haploid secondary oocyte and polar body |
| D. | diploid secondary oocyte |
| Answer» D. diploid secondary oocyte | |
| 118. |
The baby resulting from zygote as a result of invitro fertilization outside the female body is known as |
| A. | fraternal twin |
| B. | identical twin |
| C. | test tube baby |
| D. | genetic baby |
| Answer» D. genetic baby | |
| 119. |
The Urine is stored inside the body in a sac called |
| A. | scrotum |
| B. | bladder |
| C. | ureter |
| D. | urethra |
| Answer» C. ureter | |
| 120. |
The male copulatory organ used to transfer the sperms into female reproductive tract is called |
| A. | penis |
| B. | testis |
| C. | prepuce |
| D. | rectum |
| Answer» B. testis | |
| 121. |
The estrogen production stimulates the |
| A. | endometrium |
| B. | vascularization of endometrium |
| C. | inhibition of secretion follicle stimulating hormone (FSH) |
| D. | all of the above |
| Answer» E. | |
| 122. |
Most of the major organs of human embryo are formed by the |
| A. | 16th week of pregnancy |
| B. | 15th week of pregnancy |
| C. | 14th week of pregnancy |
| D. | 12th week of pregnancy |
| Answer» E. | |
| 123. |
Vernalin hormone resembles |
| A. | cytokinin |
| B. | auxin |
| C. | gibberellin |
| D. | ethene |
| Answer» D. ethene | |
| 124. |
In male reproductive system the testicles are inside a sac called |
| A. | bladder |
| B. | scrotum |
| C. | rectum |
| D. | glans |
| Answer» C. rectum | |
| 125. |
In nature p660 to p730 conversion takes place in |
| A. | red light |
| B. | white light |
| C. | day light |
| D. | dim light |
| Answer» D. dim light | |
| 126. |
If more than one egg is produced by the female and all the eggs are independently fertilized it will result in |
| A. | identical twins |
| B. | fraternal twins |
| C. | true twins |
| D. | monozygotic twins |
| Answer» C. true twins | |
| 127. |
The embryo at two celled stage has |
| A. | two blastomeres |
| B. | two gastromeres |
| C. | two centromere |
| D. | none of above |
| Answer» B. two gastromeres | |
| 128. |
Strawberry is a |
| A. | long day plant |
| B. | neutral plant |
| C. | short day plant |
| D. | day neutral plant |
| Answer» D. day neutral plant | |
| 129. |
External fertilization occurs in the |
| A. | fish |
| B. | crabs |
| C. | shrimp |
| D. | all of the above |
| Answer» E. | |
| 130. |
Genital herpes is caused by |
| A. | neisseria gonorrhoeae |
| B. | treponema pallidum |
| C. | herpes simplex type 2 |
| D. | spirochaete |
| Answer» D. spirochaete | |
| 131. |
More complex form of life is a product of |
| A. | meiosis |
| B. | genetic recombination |
| C. | mitosis |
| D. | both a and b |
| Answer» E. | |
| 132. |
The vas deferens becomes highly convulated to form |
| A. | epididymis |
| B. | prepuce |
| C. | sperm duct |
| D. | symphysis pubis |
| Answer» B. prepuce | |
| 133. |
Flowering is inhibited in short day plants and promoted in long day plants by |
| A. | yellow light |
| B. | red light |
| C. | blue light |
| D. | white light |
| Answer» C. blue light | |
| 134. |
The female reproductive cycle may be disturbed by |
| A. | malnourishment |
| B. | emotional stresses |
| C. | over-eating |
| D. | both a and b |
| Answer» E. | |
| 135. |
Red light promotes |
| A. | germination of fern spores |
| B. | leaf expansion in dicots |
| C. | leaf unrolling in grasses |
| D. | all of the above |
| Answer» E. | |
| 136. |
Parthenogenesis has the advantage of |
| A. | accelerating the normal reproductive rate |
| B. | accelerating normal respiratory activity |
| C. | accelerating normal flowering |
| D. | accelerating normal growth |
| Answer» B. accelerating normal respiratory activity | |
| 137. |
The clock in plant for measuring the duration of darkness is provided by |
| A. | rate of conversion of p660-p730 |
| B. | rate of conversion of p700 to p730 |
| C. | rate of p730 to p660 conversion |
| D. | rate of conversion of p630 to p700 |
| Answer» D. rate of conversion of p630 to p700 | |
| 138. |
The corpus luteum secretes the hormone |
| A. | estrogen |
| B. | progesterone |
| C. | testosterone |
| D. | oxytocin |
| Answer» C. testosterone | |
| 139. |
Once the placenta is established it starts secreting the hormone |
| A. | estrogen |
| B. | oxytocin |
| C. | progesterone |
| D. | testosterone |
| Answer» D. testosterone | |
| 140. |
During child birth the baby is delivered as a result of |
| A. | cervix dilation |
| B. | uterine contraction |
| C. | oxytocin release |
| D. | all of the above |
| Answer» E. | |
| 141. |
In plants with alternation of generation meiosis occurs during |
| A. | tranportation |
| B. | sporogenesis |
| C. | parthenogenesis |
| D. | none of the above |
| Answer» C. parthenogenesis | |
| 142. |
p730 to p660 conversion occurs in the |
| A. | dark |
| B. | night |
| C. | evening |
| D. | dawn |
| Answer» B. night | |
| 143. |
Germination of seeds in some lettuce varieties is promoted by |
| A. | blue light |
| B. | red light |
| C. | green light |
| D. | white light |
| Answer» C. green light | |
| 144. |
Tobacco plant flowers only after exposure to |
| A. | a series of long days |
| B. | a series of dark days |
| C. | a series of light days |
| D. | a series of short days |
| Answer» E. | |
| 145. |
Secondary spermatocytes and spermatids are formed by meiotic division in |
| A. | primary spermatocytes |
| B. | spermatogonia |
| C. | primary oocytes |
| D. | polar body |
| Answer» B. spermatogonia | |
| 146. |
Germinating pollen grain is a rich source of |
| A. | cytokinin |
| B. | gibberellin |
| C. | auxin |
| D. | none of the above |
| Answer» D. none of the above | |
| 147. |
Genetic variations are produced in |
| A. | asexual reproduction |
| B. | sporulation |
| C. | meiosis |
| D. | clonning |
| Answer» D. clonning | |
| 148. |
A reproductive cycle found in all female mammals except human is called |
| A. | oestrous cycle |
| B. | menstrual cycle |
| C. | menupause |
| D. | ovulatory cycle |
| Answer» B. menstrual cycle | |
| 149. |
Multiple fission is a characteristic reproduction mechanism in |
| A. | plant like protoctists |
| B. | animal like protoctists |
| C. | hydra |
| D. | earthworm |
| Answer» C. hydra | |
| 150. |
Internal fertilization occurs most often in |
| A. | aquatic animals |
| B. | land-based animals |
| C. | microbes |
| D. | amphibians |
| Answer» C. microbes | |