mutagens and its type along with it function
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Answer:
In genetics, a mutagen is a physical or chemical agent that changes the genetic material, usually DNA, of an organism and thus increases the frequency of mutations above the natural background level. As many mutations can cause cancer, mutagens are therefore also likely to be carcinogens, although not always necessarily so. All mutagens have characteristic mutational signatures with some chemicals becoming mutagenic through cellular processes. Not all mutations are caused by mutagens: so-called "spontaneous mutations" occur due to spontaneous hydrolysis, errors in DNA replication, repair and recombination.
- there are three types of DNA Mutations: base substitutions, deletions and insertions.
- Base Substitutions. Single base substitutions are called point mutations, recall the point mutation Glu -----> Val which causes sickle-cell disease.
- Deletions. ...
- Insertions
Mutagens affect DNA in different ways. Some mutagens, such as nitrogen mustard, bind to a base and cause it to make a different amino acid. These mutagens cause point mutations, because they change the genetic code at one point, so changing a protein's amino acid sequence.
Answer:
Mutagens. Mutagens are chemical compounds or forms of radiation (such as ultraviolet (UV) light or X-rays) that cause irreversible and heritable changes (mutations) inthe cellular genetic material, deoxyribonucleic acid (DNA).
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.
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