Before the mRNA transcribed from a gene can be used for translation into a protein,it must be:
A)coated with phospholipids for transport out of the nucleus.
B)folded into its proper three-dimensional configuration.
C)modified to remove introns,exons spliced together,and transported into the cytosol.
D)modified to remove exons,introns spliced together,and transported to a tRNA molecule.

Question

Quizplus · Accepted Answer

Before mRNA can be used for translation, it must undergo several modifications. First, introns (non-coding regions) must be spliced out and exons (coding regions) must be joined together. This is done through a process called RNA splicing. Once spliced, the mRNA is transported out of the nucleus and into the cytosol where it can be translated by ribosomes into a protein. Therefore, choice C, which describes these modifications and transportation steps, is the best answer. Choices A and D are incorrect because mRNA does not need to be coated with phospholipids for transport and it is not directly transported to tRNA molecules. Choice B is incorrect because mRNA does not need to be folded into a three-dimensional configuration like proteins do.

Before the MRNA Transcribed from a Gene Can Be Used