How Might a Single Base Substitution in the Sequence of a Gene

question 23

Multiple Choice

How might a single base substitution in the sequence of a gene affect the amino acid sequence of a protein encoded by the gene,and why?

• A)Only a single amino acid could change,because the reading frame is unaffected.
• B)The amino acid sequence would be substantially altered,because the reading frame would change with a single base substitution.
• C)All amino acids following the substitution would be affected,because the reading frame would be shifted.
• D)It is not possible for a single base substitution to affect protein structure,because each codon is three bases long.

---

Definitions:

Sale of Goods Transaction

A commercial activity involving the transfer of ownership of tangible personal property from a seller to a buyer for a price.

Bill of Exchange

A written, unconditional order by one party directing another party to pay a specified sum of money to a third party at a specified time.

Pay Money

The act of giving a certain amount of currency or financial value in exchange for goods or services.

Third Person

An individual who is not directly involved in a contract or legal agreement but may be affected by it.