E-PolyLearning

21. Protection against sudden thermal change is carried out by help of
a. water
b. salt
c. ions
d. bonds
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Answer: (a).water

22. Amino acids are composed of
a. carbon, nitrogen and oxygen
b. carbon, oxygen and sulfur
c. carbon, oxygen and hydrogen
d. carbon, oxygen, hydrogen and nitrogen
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Answer: (d).carbon, oxygen, hydrogen and nitrogen

23. Most abundant carbohydrate which is found in nature is
a. fructose
b. glycogen
c. cellulose
d. pectin
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Answer: (c).cellulose

24. Fats are solid due to presence of
a. Saturated fatty acids
b. unsaturated fatty acid
c. glycerols
d. ester bond
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Answer: (a).Saturated fatty acids

25. Overall chemical reaction that takes place with in a cell are collectively called as
a. metabolism
b. anabolism
c. complex reaction
d. catabolism
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Answer: (a).metabolism

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