Friday, April 19, 2019

WBCS Polity and Constitution MCQs Prelims and Mains

WBCS Online Preparation of General Science MCQ and Notes P5


Biology 05

21. Enzymes speed up biochemical reactions by
(A) Increasing the temperature of the reaction.
(B) Lowering the activation energy of the reaction.
(C) Increasing the activation energy of the reaction.
(D) Lowering the temperature of the reaction.

Correct Answer: [B] Lowering the activation energy of the reaction..
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22. A red rose, when seen in the green light, appears
(A) White in color
(B) Black in color
(C) Red in color
(D) Green in color.

Correct Answer: [B] Black in color.
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23. Birds differ from a bat in the absence of
(A) Trachea
(B) Diaphragm
(C) Warmblood
(D) Four-chambered heart.

Correct Answer: [B] Diaphragm.
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24. Iodine is administered to patients suffering from
(A) Ricket
(B) Rheumatism
(C) Goiter
(D) Night blindness.

Correct Answer: [C] Goiter.
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25. one of the following is the natural auxin?
(A) 2,4-D
(B) IBA
(C) NAA
(D) IAA.

Correct Answer: [D] IAA..
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