Consider the Tryptophan Codon 5-UGG-3 in the Standard

question 140

Multiple Choice

Consider the tryptophan codon 5-UGG-3 in the standard genetic code (Table 4.1, shown below) . Can a single base change in this codon create a synonymous mutation? Can a single base change in this codon create a nonsense codon?

• A)yes; yes
• B)yes; no
• C)no; yes
• D)no; no

---

Definitions:

Lens

A transparent optical component that focuses or disperses light rays, used in a variety of devices such as glasses, cameras, and microscopes to enhance vision or capture images.

Opponent-Process Cell

A type of cell in the visual system that is believed to be responsible for processing colors by encoding differences between pairs of colors such as red-green or blue-yellow.

Thalamus

A large, dual-lobed mass of grey matter buried under the cerebral cortex, involved in relaying sensory information and acting as a center for pain perception.

Bipolar Cell

A type of neuron which is found in the retina of the eye, acting as a relay between photoreceptors and ganglion cells.