NURSING ANM AND GNM

NURSING EXAM QUESTIONS

TOXICOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Chemical or form of radiation that causes inheritable changes in the DNA molecules in the genes found in chromosomes
A
teratogen
B
mutagen
C
carcinogen
D
metastasis
Explanation: 

Detailed explanation-1: -Ionizing radiation damages the genetic material in reproductive cells and results in mutations that are transmitted from generation to generation.

Detailed explanation-2: -Definition. A mutation is a change in the DNA sequence of an organism. Mutations can result from errors in DNA replication during cell division, exposure to mutagens or a viral infection.

Detailed explanation-3: -Mutagens cause mutations in three different ways: Some act as base analogs and are mistakenly used as substrates when new DNA is synthesized at the replication fork. Some react directly with DNA, causing structural changes that lead to miscopying of the template strand when the DNA is replicated.

Detailed explanation-4: -Carcinogens. Ethylene Dichlorides. Flame Retardants. Hair Dyes. Hydrocarbons, Halogenated. Mutagens. Furylfuramide. Ethylene Dibromide. DNA.

There is 1 question to complete.