AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
X rays, ultraviolet light, and radioactive substances that can change the chemical nature of DNA are classified as ____
A
hydrolytic enzymes
B
mutagens
C
cyclins
D
growth regulators
Explanation: 

Detailed explanation-1: -Radiation is another type of environmental mutagen that may cause direct changes in a cell’s DNA. For instance, ionizing radiation (i.e., X-rays) can break DNA sequences in many places, leading to chromosome rearrangement. Lower-energy radiation, such as UV rays, can also penetrate cellular and nuclear membranes.

Detailed explanation-2: -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-3: -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: -There are three basic types of mutagens: Physical mutagens. Chemical mutagens. Biological mutagens.

Detailed explanation-5: -Chemical mutagens are standard tools for mutagenesis in a variety of organisms, and they are a primary means of creating mutations in phenotype-based screens in most genetic systems.

There is 1 question to complete.