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How do mutagens affect DNA?
Chemical Mutagens Some mutagens strip DNA nucleotides (bases) of essential modifications—for example, they deaminate the bases—such that these bases resemble different nucleotides and confuse the DNA replication machinery. Subsequent rounds of DNA replication then permanently incorporate such changes.
Can mutagens cause chromosomal mutations?
These changes are most often brought on by problems that occur during meiosis (division process of gametes) or by mutagens (chemicals, radiation, etc.). Chromosome mutations can result in changes in the number of chromosomes in a cell or changes in the structure of a chromosome.
What is the meaning of mutagens?
A mutagen is a substance or agent that causes DNA impairment that results in the alteration of the DNA sequence. This alteration of the DNA sequence is known as mutation. Any agent causing mutation is called mutagen. Mutagens can be physical mutagens, chemical mutagens, or biological mutagens.
What causes mutagen?
Anything that causes a mutation (a change in the DNA of a cell). DNA changes caused by mutagens may harm cells and cause certain diseases, such as cancer. Examples of mutagens include radioactive substances, x-rays, ultraviolet radiation, and certain chemicals.
What are mutagens are all mutations caused by mutagens explain and support your answer with specific examples?
What does mutagen cause?
A mutagen is a chemical or physical phenomenon, such as ionizing radiation, that promotes errors in DNA replication. Exposure to a mutagen can produce DNA mutations that cause or contribute to diseases such as cancer.
How do mutagens affect?
Abstract. Mutagens are agents that damage DNA and can, depending on the ability of an organism to repair the damage, lead to permanent changes (mutations) in the DNA sequence. But agents that damage DNA can also damage deoxynucleoside triphosphates (dNTPs), which are used by DNA polymerases to replicate DNA.
Why do mutagens cause mutations?
Mutagens are agents that damage DNA and can, depending on the ability of an organism to repair the damage, lead to permanent changes (mutations) in the DNA sequence. But agents that damage DNA can also damage deoxynucleoside triphosphates (dNTPs), which are used by DNA polymerases to replicate DNA.