Q.
Which of the following is not considered as a mutagen
1990
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Odisha JEEOdisha JEE 2011Principles of Inheritance and Variation
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Solution:
Mutation can be artificially induced with the help of mutagenic agents which can be broadly classified as - (a) Physical mutagens (b) Chemical mutagens. Physical mutagens are mainly radiations like X rays, gamma rays, beta rays and neutrons. High temperature also causes mutations. Aminopurine is a chemical artificial base analogue of adenine. It can substitute adenine as well as can pair with cytosin. Similarly nuclear reaction cause great impact on the DNA and mutations are noticed in several generations due to nuclear reaction or explosion. Low temperature does not cause mutation.