Saturday, April 20, 2019

WBCS Polity and Constitution MCQs Prelims and Mains

Biology MCQ (General Science) Objective Q&A P21


201. Normal human blood is
(A) Acidic
(B) Alkaline
(C) Neither acidic nor basic
(D) None of this

Correct Answer: [B] Alkaline.
Explanation: pH of human blood is ranged between 7.35 - 7.45


202. Earliest gland appeared in the human embryo is
(A) Pituitary gland
(B) Thyroid gland
(C) Thymos
(D) Hypothalamus

Correct Answer: [A] Pituitary gland.
Explanation: The earliest organ that appears in the embryo is the heart.


203. The largest organ of the human body is
(A) Liver
(B) Skin
(C) heart
(D) Stomach

Correct Answer: [B] Skin.


204. Dormancy of seeds is promoted by?
(A) ABA
(B) IAA
(C) Auxin
(D) Gebbrilin

Correct Answer: [A] ABA.
Explanation: Abscisic Acid(ABA) control the dormancy of seeds. It is also called anti-gibberellin hormone.


205. Dengue is caused by Flavivirus. What is the vector of dengue fever?
(A) Aedes Mosquito
(B) Female Anopheles mosquito
(C) Male Anopheles mosquito
(D) Culex mosquito

Correct Answer: [A] Aedes Mosquito.
Explanation: Female mosquito only bites.

  • Dengue, yellow fever is caused by Aedes mosquito.
  • Malaria is caused by Anopheles mosquito.
  • Filariasis is caused by Culex mosquito.


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