Question

question 4 of 15
which of the following processes takes place in eukaryotic cells after a messenger rna molecule is transcribed from dna?
a. the mrna transcript undergoes a series of enzyme - regulated modifications.
b. the dna that was transcribed becomes associated with ribosomes to begin protein synthesis.
c. the mrna transcript is elongated by the addition of a series of introns.
d. the dna that was transcribed undergoes splicing to remove unnecessary base pairs.

Explanation:

• Option A: After transcription in eukaryotic cells, mRNA undergoes processing like capping, poly - A tail addition, and splicing (enzyme - regulated).
• Option B: DNA is not associated with ribosomes for protein synthesis. mRNA is.
• Option C: Introns are removed from mRNA, not added.
• Option D: Splicing occurs on mRNA, not on the transcribed DNA.

Answer:

A. The mRNA transcript undergoes a series of enzyme - regulated modifications.