what happens after the mrna transcript is formed in the nucleus to mark its destination?

a it immediately leaves the nucleus and enters the cytoplasm
b it begins the process of translation in the nucleus
c it is modified with molecular signs called a 5'cap and a 3'poly (a) tail
d it works with ribosomes to begin to make proteins in the nucleus

C, it is modified with molecular signs called a 5'cap and a 3'poly (A) tail.

Explanation:

The molecular signs that mark the destination of mRNA are called a 5'cap and a 3'poly (A.Tail)

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: