AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

GENE MUTATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A physical or chemical agent that can cause a change in DNA is called what?
A
Gene Expression
B
Protein
C
Mutagen
D
mRNA
Explanation: 

Detailed explanation-1: -A mutagen is a chemical or physical agent capable of inducing changes in DNA called mutations. Examples of mutagens include tobacco products, radioactive substances, x-rays, ultraviolet radiation and a wide variety of chemicals.

Detailed explanation-2: -(MYOO-tuh-jen) 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.

Detailed explanation-3: -Most chemical mutagens are alkylating agents and azides. Physical mutagens include electromagnetic radiation, such as gamma rays, X rays, and UV light, and particle radiation, such as fast and thermal neutrons, beta and alpha particles.

Detailed explanation-4: -Chemical mutagens-They include different types of chemicals that cause mutation. E.g.; EMS (Ethyl methane sulphonate). Physical mutagens-They include all types of irradiations. E.g.; gamma rays, ultraviolet rays etc.

Detailed explanation-5: -Mutagens can be physical mutagens, chemical mutagens, or biological mutagens. The ability of a substance to induce the alterations in the base pairs of DNA or mutation is known as mutagenicity.

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