Thursday, February 27, 2020

WBCS Polity and Constitution MCQs Prelims and Mains

biology questions and answers For UPSC | SSC | Rail | RRB | State PSC | neet P39


Biology 39

191. Watson and Crick are famous for their discovery of
(A) Structure of DNA
(B) Antibodies
(C) Life history of Plasmodium Vivax
(D) Vaccinia

Correct Answer: [A] Structure of DNA.
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192. The well-known antibiotic penicillin is obtained from this plant group:
(A) Lichen
(B) Angiosperm
(C) Algae
(D) Fungi

Correct Answer: [D] Fungi.
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193. RNA of a retrovirus can produce DNA by
(A) Endonuclease
(B) Reverse transcriptase.
(C) DNA polymerase
(D) RNA polymerase

Correct Answer: [B] Reverse transcriptase..
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194. The Pyrimidine bases in a DNA are:
(A) Cytosine and Guanine
(B) Thymine and Cytosine
(C) Adenine and Guanine
(D) Thymine and Adenine

Correct Answer: [B] Thymine and Cytosine.
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195. One turn of DNA helix measures
(A) 24A°
(B) 44A°
(C) 34A°
(D) 3.4A°

Correct Answer: [C] 34A°.
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