When Is a Single Base Substitution in DNA Least Likely

question 22

Multiple Choice

When is a single base substitution in DNA least likely to be deleterious?

• A)When a stop codon results
• B)When the codon that results specifies the same amino acid as the original codon
• C)When the amino acid substitution alters the tertiary structure of the protein
• D)When the amino acid substitution at the active site of an enzyme
• E)When a new start codon is inserted

---

Definitions:

Receptive Field

The specific area within the sensory space that elicits a response from any sensory neuron.

Excited

A state of heightened energy or activity, often referring to the physiological state of neurons or biochemical reactions.

Red Cones

Photoreceptor cells in the retina that are sensitive to red light, playing a critical role in color vision.

Color-blind

A visual impairment in which an individual has difficulty distinguishing between certain colors, typically red and green or blue and yellow.