Question

question 3
rna polymerase trascribes the coding strand to give an identical copy in rna form of the actual gene
true
false
question 4
in eukaryotes, the mrna transcript needs to undergo post - transcriptional modification to remove introns
true
false
question 5
to protect the mrna during transport out of the nucleus a poly - a tail is added to both ends
true
false

Explanation:

QUESTION 3

RNA polymerase transcribes the template strand (not the coding strand) to produce mRNA. The coding strand has the same sequence as the mRNA (except T vs U), but transcription uses the template strand. So the statement is false.

In eukaryotes, pre - mRNA has introns (non - coding regions) and exons (coding regions). Post - transcriptional modification (RNA splicing) removes introns and joins exons. So the statement is true.

In eukaryotes, a poly - A tail is added to the 3' end of mRNA, and a 5' cap is added to the 5' end for protection during transport out of the nucleus. It is not added to both ends. So the statement is false.

Answer:

False

QUESTION 4