Question

radon is a radioactive gas that is sometimes present in homes. if radon is inhaled, its decay products are deposited in the lungs. radioactive particles can penetrate cells and cause changes to the cells’ dna. these changes in dna are an example of which of the following?
a mutation
b proteins
c hormones
d mitosis

Explanation:

The question is about changes in DNA due to radioactive particles (from radon decay) causing alterations. Mutations are changes in DNA sequence. Promoters are DNA regions for transcription, homologous pairs are chromosome pairs, and introns are non - coding DNA. So the change in DNA is a mutation.

Answer:

A. mutation