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Structure Of The Cell - Questions and Answers

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141. Chitin is strengthened by
A. Calcium phosphate
B. Magnesium phosphate
C. Calcium carbonate
D. Magnesium carbonate
Explanation:
142. Nonmineral essential elements are
A. Carbon, Hydrogen and Oxygen
B. Hydrogen, Nitrogen and Sulphur
C. Hydrogen, Nitrogen and Fluorine
D. Chlorine, Fluorine and Nitrogen
Explanation:
143. Water has high specific heat due to
A. Its dipole nature
B. Smaller angle between hydrogen atoms and oxygen atom
C. Hydrogen bonds amongst molecules
D. All the above
Explanation:
144. Big four elements are
A. Carbon, Hydrogen, Oxygen and Sulphur
B. Carbon, Oxygen, Sulphur and Phosphorus
C. Carbon, Nitrogen, Sulphur and Phosphorus
D. Carbon, Hydrogen, Oxygen and Nitrogen
Explanation:
145. Ice is lighter than water due to
A. Lattice aggregates occupy more space
B. Cold water is extremely dense
C. Absence of hydrogen bonds in ice
D. Absence of lattice aggregates in ice
Explanation:
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