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.
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.
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.
189. Which Carbohydrate is used commercially in the silvering of mirrors?
(A) Cellulose
(B) Glucose
(C) Sucrose
(D) Fructose

Correct Answer: [B] Glucose.
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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