A) hydrophilic
B) hydrophobic
C) neutral
D) zwitterions
Correct Answer: B
Solution :
Water attracting molecules are called hydrophilic. Water repelling molecules are called hydrophobic. Amino acids carry simultaneously positive and negative charges. Such molecules are called zwitter ions. Lipids are compounds of C, H, O but the ratio of H and 0 is more than 2 : 1 that is the ratio of oxygen is lesser than carbohydrates. Lipids are insoluble in water but soluble in non-polar solvents such as benzene, chloroform etc. Commonest lipid found in a cell is phospholipid. It contains a hydrophilic (polar) head and a hydrophobic (non- polar tail).
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