biology MCQs – Page 8

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 Review each marked answer and report any item that may be outdated or unclear.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
141. NADH is oxidized by___________?
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A. Cytochrome b

B. Oxygen

C. Coenzyme ?

D. Glycolysis

142. What is the mode of transmission of Hepatitis virus?
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A. Aerosol

B. Unknown

C. Parentral (via blood)

D. Skin penetration

143. ___________ are needed as a source of energy for the vital activities of the body?
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A. Calcium

B. Carbohydrates

C. Water

D. Iron

144. Taking in liquid material into the cells is known as_________?
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A. Phagocytosis

B. Pinocytosis

C. Exocytosis

D. Both a and b

145. Two or more populations of different species living and interacting in the same area form
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A. Ecosystem

B. Community

C. Population System

D. Biosphere

E. Species

146. Bacteria which grow either in the presence or absence of oxygen___________?
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A. Anaerobic bacteria

B. Aerobic bacteria

C. Microaerophilic

D. Facultative bacteria
147. Which statement is incorrect for cloning?
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A. It involve methods of sexual reproduction

B. Division of a single egg into one or more separate embryos.

C. The individual is the mirror image of the parent organism

D. The nucleus of a fertilized egg is replaced by the nucleus from the cell of a fully developed individual

148. Messenger RNA is formed in_________?
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A. itochondria

B. ucleus

C. hloroplast

D. one of these

149. Smallest disease causing agents in plants are ?
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A. virion

B. mycoplasma

C. viroids

D. prions

150. Percentage of water in brain cells is_______?
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A. 20%

B. 85%

C. 65%

D. 89%

151. Conclusion of Mendels work latter became a_____________?
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A. Theory

B. Productive theory

C. Scientific law

D. Scientific hypothesis

152. The Science of growing terrestrial plants in an aerated solution is_________?
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A. Hydrodynamics

B. Hydroponics

C. Hydrotonics

D. None of them

153. A-biogenesis means that_____________?
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A. Mycobionts

B. Living things originated from bacteria

C. Non-living things

D. None of these

154. Who is Called the Father of Demography?
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A. John Dalton

B. Charles Babbage

C. IBN KHALDUN

D. ALAN Turing

155. Control of organisms by using living organisms is called_______?
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A. Antisepsis

B. Biological control

C. Bioremediation

D. Integrated disease management

156. Ribosomes were discovered by_______?
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A. Palade

B. Golgi

C. R.Brown

D. De Duve

157. Initial pH of food vacuole during digestion in amoeba is____________?
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A. 7.3

B. 7.6

C. 5.6

D. 5.3

158. Members of one species inhabiting the same are form__________?
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A. Community

B. Ecosystem

C. Population

D. Species

159. __________ is essential for the formation of hemoglobin.
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A. Carbohydrates

B. Water

C. Calcium

D. Iron
160. The concept that various organisms dominated this planet during various geological time period and thus placing organisms in a time squence came from the studies by ?
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A. Paleontologist

B. Marine biologist

C. Environmental biologist

D. Social biologist