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