PATHOLOGY MCQ
GENETICS AND DISEASE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
A change in the cell’s structure
|
|
|
Anything that changes in an embryo
|
|
|
Any change in the physical features of a human
|
|
|
A change in the DNA sequence
|
Detailed explanation-1: -(myoo-TAY-shun) Any change in the DNA sequence of a cell. Mutations may be caused by mistakes during cell division, or they may be caused by exposure to DNA-damaging agents in the environment. Mutations can be harmful, beneficial, or have no effect.
Detailed explanation-2: -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: -Mutation is a process that causes a permanent change in a DNA sequence. Changes to a gene’s DNA sequence, called mutations, can change the amino acid sequence of the protein it codes for-but they don’t always.
Detailed explanation-4: -Types of Mutations Yet another type of mutation is the nonsynonymous mutation, in which an amino acid sequence is changed. Such mutations lead to either the production of a different protein or the premature termination of a protein.