biology MCQs – Page 9

Practise multiple-choice questions from biology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

biology Mcqs
161. Water has maximum density at____________?
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A. 0C

B. 4C

C. 4 K

D. 4.8C

162. Study of insects is called_________?
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A. Parasitology

B. Entomology

C. Immunology

D. Paleontology

163. In human body 99% of total mass is formed of_____________?
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A. 12 Bio-elements

B. 6 Bio-elements

C. 10 Bio-elements

D. 16 Bio-elements

164. Different species of plants and animals living in the same habitat is called ___________?
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A. Community

B. Habitat

C. Population

D. Biome

165. Pollen grains in pinus have __________ for dispersal through wind?
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A. Feathers

B. Wings

C. Flagella

D. Cilia

166. The atoms of different elements combine with each other through ionic or covalent bonding to produce compounds this stable form is called:
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A. An organ

B. A molecule

C. Tissue

D. Both a and c

167. An infectious disorder of respiratory system is_________________?
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A. Tuberculosis

B. Emphysema

C. Cancer

D. Asthma

168. Which Vitamin is needed for the formation of a light-sensitive pigment in the retina.
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A. Vitamin A

B. B complex

C. Vitamin C

D. Vitamin D

169. The evaporative cooling in the respiratory tract of dogs is called?
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A. All of these

B. Vasoconstriction

C. Vasodilation

D. Panting
170. Capillaries are the example of_________?
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A. Organ System

B. Tissue

C. Cell

D. Organ

171. A structure formed by groups of similar cells organized into loose sheetsor bundles performing similar functions is called as________?
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A. An organ

B. An organism

C. A Tissue

D. A Cell

172. Different species of plants and animals living in the same habitat is called?
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A. Community

B. Population

C. Biome

D. Habitat

173. Breakdown of large molecules into smaller ones utilizing water molecules is_________?
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A. Hydrolysis

B. Hydration

C. Electrolysis

D. Dehydration synthesis

174. The number of species of organisms currently known to science is?
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A. 2500000

B. 3500000

C. 35000

D. 25000000

175. Mitosis is divided into_____________?
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A. Karyokinesis

B. Cytokinesis

C. Interphase

D. Both a & b
176. Which of the following is the correct sequence in the biological method?
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A. Observation?hypothesis?law?theory

B. law?theory?deduction?observation

C. Observation?hypothesis?deduction?testing of deduction

D. Hypothesis?observation?deduction?testing of deduction

177. Out of 92 naturally occurring chemical elements how many are considered as bio-elements__________?
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A. 6

B. 16

C. 26

D. 15

178. Which of the following is an example of molecule?
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A. Chloroplast

B. Hydrogen

C. DNA

D. A Nerve Cell

179. Which is an organic compound found in most cells ?
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A. Water

B. Glucose

C. Sodium chloride

D. Oxygen

180. Dolly, the sheep was a highly successful clone from a somatic cell, reported back in________?
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A. 1996

B. 1994

C. 1993

D. 1995