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
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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
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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
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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
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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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