science
Grade-10
Easy

Question

Which chemical mutagens add an OH-group to DNA base pairs?

  1. Hydroxylating agents.

  2. Deaminating agents.

  3. Alkylating agents.

  4. All of the above.

hintHint:

OH ions are called as?

The correct answer is:

Hydroxylating agents.


    • Pure water contains H+ and OH- ions
    • The H+ is called proton and OH- ions are called hydroxyl ions
    • Hydroxylating agents are classified under chemical mutagens
    • These agents add hydroxyl groups to a base and cause modify the structure of the base
    • Hydroxylamine is a hydroxylating agent which add hydroxyl group to adenine
    • The structurally modified adenine pairs with guanine instead of thymine

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