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61. Percentage of water in the body of a living being like human is
A. 10 – 20%
B. 50%
C. 70 – 80%
D. 90 – 95%
Explanation:
62. Proteins and DNA attain their 3-dimensional reactive configuration in contact with
A. Lipids
B. Sugars
C. Zymogens
D. Water
Explanation:
63. Life originated in
A. Lithosphere
B. Hydrosphere
C. Atmosphere
D. All the above
Explanation:
64. Counter-current system of kidneys is maintained by
A. Chloride
B. Glucose
C. Sodium
D. Sucrose
Explanation:
65. A macromolecule is
A. Amino acid
B. Nucleotide
C. Cellulose
D. Water
Explanation:
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