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2301. The source of immediate energy for cellular activity is
A. FAD
B. RNA
C. NAD
D. ATP
Explanation:
2302. Uncontrolled industrialisation leads to acid rain. It is mainly contributed by
A. carbon dioxide
B. methane gas
C. chlorofluoro carbons
D. nitrous and sulphur dioxide
Explanation:
2303. Pollution consists of emission of : toxic gases like carbon dioxide, and others, release of toxic particles of lead, sulphur, and other compounds, dust and smoke haze; rise in temperatures to abnormal levels, etc. Forests and oceans counteract these effects by
A. absorbing sunlight
B. emitting counter-toxic materials
C. reacting with toxic gases producing acids
D. absorbing carbon dioxide and emitting oxygen and water vapour
Explanation:
2304. Suppose in a balanced green forest, the number of tigers was doubled. This would gradually
A. decrease the biomass of herbivores
B. decrease the biomass of producers
C. increase primary carnivores
D. increase the biomass of herbivores
Explanation:
2305. Which of the following is the lightest gas ?
A. Nitrogen
B. Hydrogen
C. Ammonia
D. Carbon dioxide
Explanation:
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