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General Science - Questions and Answers

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2306. The highest grade of coal whose surface is shining and has the highest calorific value, is
A. Bituminous
B. Lignite
C. Anthracite
D. Peat
Explanation:
2307. A scientist was treating pathogenic bacteria with different chemicals to see which of them would stop the activity of their ribosomes. Whihc one of the following processes is the target ?
A. DNA synthesis
B. Digestion of proteins
C. Protein synthesis
D. Production of ATP
Explanation:
2308. Green house effect means
A. pollution in houses in tropical region
B. trapping of solar energy due to atmospheric carbon dioxide
C. prevention from ultra violet radiations by the ozone layer
D. None of these
Explanation:
2309. Nitrogen fixation is done by
A. red algae
B. green algae
C. brown algae
D. blue-green algae
Explanation:
2310. The largest source of pollution in the world is
A. industrial effluents
B. sewage and garbage
C. automobile exhausts
D. herbicides and insecticides
Explanation:
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