Why Might a Point Mutation in DNA Make a Difference

question 6

Multiple Choice

Why might a point mutation in DNA make a difference in the level of a protein's activity?

• A) It might result in a chromosomal translocation.
• B) It might exchange one stop codon for another stop codon.
• C) It might exchange one serine codon for a different serine codon.
• D) It might substitute a different amino acid in the active site.
• E) It might substitute the N-terminus of the polypeptide for the C-terminus.

---

Definitions:

Electromyograph

A diagnostic tool used to measure the electrical activity produced by skeletal muscles, indicating muscle activity and health.

Muscle Tension

A condition in which muscles remain semi-contracted for an extended period, often as a response to stress or anxiety.

Polygraph

A device used to measure and record physiological indicators such as blood pressure, pulse, and respiration, often used in lie detection.

Ascending Reticular Activating System

A network of neurons in the brainstem essential for regulating arousal and consciousness, influencing alertness and the sleep-wake cycle.