Saturday, April 20, 2019

WBCS Polity and Constitution MCQs Prelims and Mains

Biology MCQs For WBCS Prelims and Mains P20



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.

192. The well-known antibiotic penicillin is obtained from this plant group:
(A) Lichen
(B) Angiosperm
(C) Algae
(D) Fungi.

Correct Answer: [D] Fungi.

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.

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.

195. One turn of DNA helix measures
(A) 24A°
(B) 44A°
(C) 34A°
(D) 3.4A°

Correct Answer: [C] 34A°.




196. The tasar silk fiber is produced by
(A) Philosomia ricini
(B) Antheraea assamensis
(C) Antheraea mylitta
(D) Bombyx mori.

Correct Answer: [C] Antheraea mylitta.

You can download objective (MCQ) questions and answers on Biology in PDF format for off-line study. You can also download study materials for WBCS prelims and main from Study Material section.







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