Gene Expression Might Be Altered at the Level of Post-Transcriptional

question 44

Multiple Choice

Gene expression might be altered at the level of post-transcriptional processing in eukaryotes rather than prokaryotes because of which of the following?

• A) Eukaryotic mRNAs get 5' caps and 3' tails.
• B) Prokaryotic genes are expressed as mRNA, which is more stable in the cell.
• C) Eukaryotic exons may be spliced in alternative patterns.
• D) Prokaryotes use ribosomes of different structure and size.
• E) Eukaryotic coded polypeptides often require cleaving of signal sequences before localization.

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Definitions:

Pattern

A recognizable repetition of elements or designs, often identified in nature, human behavior, or manufactured objects.

Figure-Ground Relationships

A visual perception principle distinguishing an object (the figure) from its surrounding area (the ground).

Objects

Physical items that occupy space and have properties that can be perceived by the senses.

Shape Constancy

The perceptual phenomenon whereby the perceived shape of an object remains constant even when its orientation to the viewer changes.