The Initial Event in the Conversion of an HnRNA to the Mature

question 29

Multiple Choice

The initial event in the conversion of an hnRNA to the mature RNA which leaves the nucleus is:

• A) formation of ribonucleoprotein particles (RNPs).
• B) capping the 5'-end of the transcript with a guanylyl group by guanylyl transferase.
• C) addition of a poly(A) tail to the 3'-end of the transcript by poly(A) polymerase.
• D) splicing together of the exons.
• E) transesterification reactions in lariat formation.

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Definitions:

Thoracic

Relating to the thorax or chest region, involving organs such as the heart and lungs within the rib cage.

Sagittal

Referring to a plane or section that divides the body or an organ into right and left portions.

Oblique

Positioned at an angle; not perpendicular or parallel to a reference line.

Frontal

Pertaining to the forehead or the front part of the body; in anatomy, it often refers to the frontal bone or lobes of the brain.