science
Grade-10
Easy

Question

Base analogs are which type of mutagens?

  1. Chemical mutagens.

  2. Physical mutagens.

  3. Biological mutagens.

  4. Natural mutagens.

hintHint:

Base analogues are derived from DNA bases.

The correct answer is:

Natural mutagens.


    • DNA is made up of nucleotides (combination of a sugar, base and phosphate)
    • The bases include adenine, guanine, cytosine and thymine in DNA
    • Molecules having structure similar to that of the natural bases are found naturally which are called base analogues
    • These base analogues can interfere during metabolism and cause mutation
    • 5-bromouracil, 2-aminopurine are commonly known natural base analogues

    • Bases are classified into purine and pyrimidine
    • Purine include adenine and guanine which are two ringed structures
    • Pyrimidine include thymine and uracil which are single ringed structures

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