Question

9.What are mutagens?Name a chemical mutagen?

Answer 1

A mutagen is any agent that affects a change (specifically referring to a change in DNA). Thus any carcinogen (that increases the risk of getting cancer by causing mutations) is a mutagen. Common mutagens include: bromine, sodium azide, psoralen, benzene, x-rays, gamma rays, alpha particles, ultraviolet radiation, etc.

Answer 2

Mutagens and some chemical mutagen

Explanation:

• Mutagens are the mutation producing agents. They are accountable for the incidence of mutation and reasons variations in the chromosomes of an individual. They are mainly of two types:  

• Chemical mutagens - They include different types of chemicals that cause mutation. E.g.; EMS (Ethyl methane sulphonate).  

• A chemical mutagen is a substance that can alter a base that has already been incorporated into DNA and thereby change its hydrogen bonding specificity.

• Physical mutagens - They include all types of irradiations. E.g.; gamma rays, ultraviolet rays etc.

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