Question

1. A mutation is a ___ in the nucleotide sequence of a gene within the DNA molecule.

2. Chemicals that cause a mutation are known as ____.

Answer 1

A mutation is a change in the DNA sequence that can be caused by various factors, including physical or chemical agents called mutagens. Mutagens can lead to a range of effects, some of which may result in diseases like cancer.

Step-by-step explanation:

A mutation is a change in the nucleotide sequence of a gene within the DNA molecule. Mutations can occur spontaneously or as a result of exposure to various mutagens, which are agents that increase the frequency of mutation above the natural background level. Mutagens can be physical, like UV light and X-rays, or chemical, such as polycyclic aromatic hydrocarbons. Some mutagens are also known as carcinogens because they can lead to cancer.

There are different types of mutations, such as point mutations that involve a single nucleotide change, and larger-scale mutations that involve large segments of DNA. These changes can affect an organism in various ways, from being harmless, to causing diseases, or potentially providing evolutionary advantages.

Chemicals that cause mutations, or mutagens, are often found in the environment and can include components of smoke, certain chemicals used in industry, and some that occur naturally in food.

Answer 2

1. A mutation is a "Change" in the nucleotide sequence of a gene within the DNA molecule.

2.Chemicals that cause a mutation are known as "Mutagens"

Hope this helps!