MCQOPTIONS
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MCQOPTIONS
This section includes 533 Mcqs, each offering curated multiple-choice questions to sharpen your Life Sciences knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Pendulous stamens and slender filaments are characteristics of plants pollinated by |
| A. | wind |
| B. | insects |
| C. | water |
| D. | soil |
| Answer» C. water | |
| 102. |
Stomata guard cells perform all functions but |
| A. | producing sugars |
| B. | protecting the inner regions of leaf |
| C. | regulating the amount of water lost |
| D. | chloroplast storage |
| Answer» C. regulating the amount of water lost | |
| 103. |
All are wrong about Bacteria, but |
| A. | cannot grow in fertilized soil |
| B. | cannot degrade DDT |
| C. | degrade DDT into simpler substances |
| D. | digest white blood cells |
| Answer» C. degrade DDT into simpler substances | |
| 104. |
Chemotactive movements response towards stimulus of |
| A. | light |
| B. | heat |
| C. | chemicals |
| D. | All of the Above |
| Answer» D. All of the Above | |
| 105. |
Example of dioecious plant includes |
| A. | allamanda |
| B. | pawpaw |
| C. | hibiscus |
| D. | clitoria |
| Answer» C. hibiscus | |
| 106. |
First photosynthesizing organs of a germinating seed are |
| A. | cotyledons |
| B. | Plumule |
| C. | first foliage leaves |
| D. | radical |
| Answer» D. radical | |
| 107. |
If herbaceous stem loose its turgidity, it may |
| A. | die |
| B. | regrow |
| C. | regenerate |
| D. | wilt |
| Answer» E. | |
| 108. |
Exoskeleton is hardened outer covering which is |
| A. | inert |
| B. | non-living |
| C. | attached to internal muscles |
| D. | All of the Above |
| Answer» E. | |
| 109. |
In germinating seeds, the fats are broken down with the help of enzyme |
| A. | amylase |
| B. | lipase |
| C. | sucrose |
| D. | proteases |
| Answer» C. sucrose | |
| 110. |
Flowers of grass have |
| A. | nectar |
| B. | no nectar |
| C. | sour nectar |
| D. | bitter nectar |
| Answer» C. sour nectar | |
| 111. |
Male and female sex organs appear on sameprothallus in region of under surface, this property is |
| A. | monoecious |
| B. | diecious |
| C. | triecious |
| D. | quadecious |
| Answer» B. diecious | |
| 112. |
Atropa Belladona is used for medicine because it is rich in |
| A. | atrocone |
| B. | Atropine |
| C. | pine |
| D. | atripine |
| Answer» C. pine | |
| 113. |
Bryophytes is another name for which of following plants? |
| A. | flowering |
| B. | vascular |
| C. | avascular |
| D. | leguminous |
| Answer» D. leguminous | |
| 114. |
Which of following is primary photosynthetic organ of a plant? |
| A. | stems |
| B. | leaves |
| C. | bulbs |
| D. | roots |
| Answer» C. bulbs | |
| 115. |
Which of liverworts have leaf-like appendages on their sporophytes? |
| A. | marchantia |
| B. | angiosperms |
| C. | ferns |
| D. | Plagiochila |
| Answer» D. Plagiochila | |
| 116. |
Blood pressure required for ultrafiltration is provided through |
| A. | simple mechanical process |
| B. | afferent arteriole |
| C. | efferent arteriole |
| D. | heart beat |
| Answer» C. efferent arteriole | |
| 117. |
From how many years megaphylls started appearing in fossil record? |
| A. | 370 million |
| B. | 100 million |
| C. | 1 million |
| D. | 10 million |
| Answer» B. 100 million | |
| 118. |
Which of following are organs of plants whose function is to absorb nutrients from soil? |
| A. | stems |
| B. | bulbs |
| C. | roots |
| D. | leaves |
| Answer» D. leaves | |
| 119. |
What percentage of world's soil carbon is present in peatlands? |
| A. | 0.1 |
| B. | 0.2 |
| C. | 0.3 |
| D. | 0.4 |
| Answer» D. 0.4 | |
| 120. |
Only cells that undergo division in epidermis are found in |
| A. | cornified layer |
| B. | Granular layer |
| C. | Malpighian layer |
| D. | cuticular layer |
| Answer» D. cuticular layer | |
| 121. |
In bulbs, food is stored in the form of |
| A. | sugar |
| B. | glucose |
| C. | amino acids |
| D. | starch |
| Answer» B. glucose | |
| 122. |
Carbon dioxide (CO₂) is reduced to carbohydrate (CₙH₂ₘOₘ) through |
| A. | oxygen |
| B. | water |
| C. | hydrogen |
| D. | light-dependent stage |
| Answer» D. light-dependent stage | |
| 123. |
Which of following is produced by meiosis in a mature sporophyte? |
| A. | spores |
| B. | gamete |
| C. | gametophyte |
| D. | spore |
| Answer» B. gamete | |
| 124. |
Ovary walls are fused with the receptacle if the |
| A. | ovary is inferior |
| B. | ovary is superior |
| C. | anther is inferior |
| D. | anther is superior |
| Answer» B. ovary is superior | |
| 125. |
Important well known ferns are Dryopteris, Pteries Pteridium and |
| A. | equisetum adiantum |
| B. | adiantum equisetum |
| C. | equisetum |
| D. | adiantum |
| Answer» E. | |
| 126. |
Water molecule is split into hydrogen and oxygen in |
| A. | light dependent stage |
| B. | light independent stage |
| C. | photolysis of water |
| D. | oxidation reaction |
| Answer» D. oxidation reaction | |
| 127. |
Digestion of stored foods occur in cotyledons in |
| A. | endospermic seeds |
| B. | non-endospermic seeds |
| C. | exospermic seeds |
| D. | non-exospermic seeds |
| Answer» C. exospermic seeds | |
| 128. |
Timber is mostly provided from which of following? |
| A. | Douglas fir |
| B. | juniper |
| C. | European larg |
| D. | Wollemi pine |
| Answer» B. juniper | |
| 129. |
Flower possessing both the androecium and gynoecium are known as |
| A. | Dioecious |
| B. | Hermaphrodite |
| C. | Monoecious |
| D. | Triecious |
| Answer» C. Monoecious | |
| 130. |
Bones and cartilages are composed of protein known as |
| A. | lipoprotein |
| B. | globulin |
| C. | collagen |
| D. | albumin |
| Answer» D. albumin | |
| 131. |
Which of following is known as peat moss? |
| A. | marchantia |
| B. | angiosperms |
| C. | ferns |
| D. | sphagnum |
| Answer» E. | |
| 132. |
Softer connective tissue which covers end of bone joint is |
| A. | exoskeleton |
| B. | compact bone |
| C. | sponge bone |
| D. | cartilage |
| Answer» E. | |
| 133. |
Landing platform is provided to insects through |
| A. | calyx |
| B. | epicalyx |
| C. | pedicel |
| D. | petals |
| Answer» E. | |
| 134. |
An organic substance which hardens secondary cell wall is usually impregnated with |
| A. | xylem |
| B. | phloem |
| C. | sclereides |
| D. | lignin |
| Answer» E. | |
| 135. |
70 to 90% of cell protoplasm is |
| A. | hemoglobin |
| B. | protoplasm |
| C. | water |
| D. | energy |
| Answer» D. energy | |
| 136. |
Potassium, calcium and magnesium are the form of |
| A. | essential non-metallic elements |
| B. | essential metallic elements |
| C. | non-essential non-metallic elements |
| D. | non-essential metallic elements |
| Answer» C. non-essential non-metallic elements | |
| 137. |
Sporophyte is dominant and gametophyte is small and reduced but separate as well as independent. This development shows heteromorphic alternation of generation |
| A. | hetromorphic alternation of generation |
| B. | automorphic alternation of generation |
| C. | hetromorphic alternation |
| D. | hypomorphic alternation of generation |
| Answer» B. automorphic alternation of generation | |
| 138. |
Function of funicle is to |
| A. | hold the flower upright for pollination |
| B. | attach ovule to placenta |
| C. | produce the ovum |
| D. | to attach anther with filament |
| Answer» C. produce the ovum | |
| 139. |
Growth of roots towards water is positive hydrotropism if it grows towards |
| A. | soil |
| B. | water |
| C. | nutrients |
| D. | sun |
| Answer» C. nutrients | |
| 140. |
Most earliest group of plants which are rootless are one which become |
| A. | developed |
| B. | alternated |
| C. | extinct |
| D. | enlarged |
| Answer» D. enlarged | |
| 141. |
Clitoria has all of others characteristics but the flower is |
| A. | incomplete |
| B. | bisexual |
| C. | bilaterally symmetrical |
| D. | all of above |
| Answer» B. bisexual | |
| 142. |
Cranial nerves and sense organs are included in the |
| A. | Peripheral nervous system |
| B. | Central nervous system |
| C. | white matter of spinal cord |
| D. | grey matter |
| Answer» B. Central nervous system | |
| 143. |
Branches of Crataegus give an excellent wood, which can be used to make |
| A. | walking sticks |
| B. | furniture |
| C. | toys |
| D. | cupboards |
| Answer» B. furniture | |
| 144. |
To get pollens, mature stigma shall |
| A. | project out of the bracts and hang freely |
| B. | provide a large feathery surface area to get the pollens floating around |
| C. | turn itself non-sticky and decrease its surface area |
| D. | turn itself non-feathery and decrease its surface area |
| Answer» C. turn itself non-sticky and decrease its surface area | |
| 145. |
In which part of stamen in pollen produced? |
| A. | anther |
| B. | spores |
| C. | petals |
| D. | pistil |
| Answer» B. spores | |
| 146. |
Bracts are commonly found in |
| A. | orchids |
| B. | clitoria |
| C. | pawpaw |
| D. | grasses |
| Answer» E. | |
| 147. |
Which of following strengthens cell walls of xylem cells? |
| A. | lignin |
| B. | chitin |
| C. | cellulose |
| D. | proteins |
| Answer» B. chitin | |
| 148. |
Which is true about grasses |
| A. | a common flowering plants |
| B. | not a flowering plants |
| C. | a flowering plant |
| D. | a uniflowering plants |
| Answer» B. not a flowering plants | |
| 149. |
Gametophyte doesn't undergo reshuffling of genes because gamates are produced by |
| A. | division |
| B. | mitosis |
| C. | meosis |
| D. | conjugation |
| Answer» C. meosis | |
| 150. |
Leaves and petals follows growth pattern with respect to movement is |
| A. | epinasty |
| B. | hyponasty |
| C. | nutation |
| D. | hypernasty |
| Answer» B. hyponasty | |