The spliceosome functions to:
A)insert introns into mRNA sequences before translation.
B)create noncoding sequences in genes to enhance gene stability.
C)remove noncoding introns from transcribed RNAs.
D)control translation,ensuring that only exons are translated.
E)inhibit transcription of noncoding DNA regions.

Question

Quizplus · Accepted Answer

The spliceosome is responsible for removing noncoding introns from transcribed RNAs. It identifies the boundaries between exons and introns and removes the introns while joining the exons together to form the mature mRNA molecule.

Note: Choice A is incorrect because introns are actually removed by the spliceosome, not inserted. Choice B is incorrect because noncoding sequences do not enhance gene stability, and the spliceosome is not responsible for creating noncoding sequences. Choice D is incorrect because the spliceosome is not involved in translation, which occurs after mRNA leaves the nucleus. Choice E is incorrect because the spliceosome is not responsible for inhibiting transcription.

The Spliceosome Functions To