Question

a chemical that causes alterations in dna is a ____, and if this chemical causes cancer it is called a(n) ____.
o mutagen; carcinogen
o tumor suppressor; mutagen
o tumor suppressor; oncogene
o tumor suppressor; proto - oncogene
o carcinogen; mutagen

Explanation:

• A mutagen is a substance that can cause alterations (mutations) in DNA.
• A carcinogen is a substance that can cause cancer. If a mutagen also causes cancer, it is called a carcinogen.
• Tumor suppressor genes are normal genes that help prevent cancer. Oncogenes are genes that have the potential to cause cancer. Proto - oncogenes are normal genes that can become oncogenes due to mutations.

Answer:

mutagen; carcinogen