Thursday, February 27, 2020

WBCS Polity and Constitution MCQs Prelims and Mains

biology questions and answers For UPSC | SSC | Rail | RRB | State PSC P38


Biology 38

186. Vinegar is a dilute solution of
(A) Ethanol
(B) Acetic acid
(C) Formaldehyde
(D) Formic acid

Correct Answer: [B] Acetic acid.
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187. The enzyme 'DNA gyrase' is associated with the function of
(A) Lipid biosynthesis
(B) DNA damage
(C) Protein syntheses
(D) DNA replication

Correct Answer: [D] DNA replication.
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188. Fixation of nitrogen is meant
(A) Manufacture of nitrogen from the air.
(B) Conversion of nitrogen into nitric acid.
(C) Liquefaction of nitrogen.
(D) Conservation of atmospheric nitrogen into a useful component

Correct Answer: [D] Conservation of atmospheric nitrogen into a useful component.
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189. Which Carbohydrate is used commercially in the silvering of mirrors?
(A) Cellulose
(B) Glucose
(C) Sucrose
(D) Fructose

Correct Answer: [B] Glucose.
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190. Succinic acid dehydrogenase to give
(A) Iso-citric acid
(B) Fumaric acid
(C) Malic acid
(D) Formic acid

Correct Answer: [B] Fumaric acid.
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