Question : The hydrophilic nature of DNA is due to the presence of:
Option 1: thymine base
Option 2: many hydrogen bonds
Option 3: phosphate group
Option 4: deoxyribose sugar
Correct Answer: phosphate group
Solution : The correct option is the phosphate group.
Being hydrophilic refers to having an affinity for water or having the ability to interact with it by forming hydrogen bonds. Due to the presence of phosphate groups, which have a negative charge from extra electrons, and the phosphate backbone being exposed to the surface, where they may easily interact with water, DNA has a hydrophilic character.
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