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Science → MCQs → Science Quiz from 291 to 295

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291. The respiratory problem most common in smokers is
(A) tuberculosis
(B) emphysema
(C) asthma
(D) cancer

292. Water potential of pure water is
(A) zero
(B) one
(C) negative
(D) two

293. Bean shaped cells in plants are
(A) mesophyll cells
(B) xylem cells
(C) phloem cells
(D) guard cells

294. The normal pH of human blood is
(A) 6.4
(B) 7.0
(C) 7.4
(D) 7.5

295. Shrinkage of protoplast due to exosmosis of water is
(A) imbibition
(B) plasmolysis
(C) deplasmolysis
(D) adhesion

ANSWERS: SCIENCE QUIZ
291. (B) emphysema
292. (A) zero
293. (D) guard cells
294. (C) 7.4
295. (B) plasmolysis