Gene Mutations

Which detail from the section "Point Mutations" BEST introduces silent mutations to the reader?

• Also called a base-pair substitution, this type of mutation changes a single nucleotide base pair.

• Proteins are chains of amino acids linked together. Each amino acid is coded for by a three-nucleotide set called a codon.

• Although a change in the DNA sequence occurs, this type of mutation does not change the protein that is to be produced.

• This type of mutation alters the nucleotide sequence so that a different amino acid is produced.

What is MOST likely the reason the author included the information about base-pair insertions and deletions?

• to highlight genetic mutations that are automatically beneficial to a protein's function

• to highlight genetic mutations that only affect one nucleotide in the DNA sequence

• to describe genetic mutations that have no effect on the protein that was supposed to be produced

• to describe genetic mutations that can completely change how a DNA sequence is read

How effective is the introduction [paragraphs 1-3] at introducing gene mutations?

• Effective; it describes the types of environmental factors that effect whether or not a gene mutation will occur.

• Effective; it explains what a gene mutation is and which types of mutations will be described in the article.

• Not effective; it does not provide information about what could happen as a result of a gene mutation.

• Not effective; it focuses on explaining what gene sequences are and fails to define what a gene mutation is.

Not effective; it focuses on explaining what gene sequences are and fails to define what a gene mutation is.

• how many types of environmental factors affect gene mutations

• how many types of gene mutations there are

• what types of events can cause gene mutations

• what types of diseases are caused by gene mutations