If a $DNA$ strand has the base sequence $5'-AAAA-3'$,then the base sequence of the complementary $m-RNA$ is:

Given below are the two statements.
Statement $I$: Only one strand in the transcription unit functions as a template and is called the antisense strand.
Statement $II$: The non-template strand of the transcription unit is called the sense strand.
In the light of the above statements,choose the correct answer from the options given below.

Which $RNA$ is formed after the maturation of $hnRNA$?

Spliceosomes are not found in cells of

The molecular basis of cell differentiation depends on the regulation of:

$A$: Sigma factor of $RNA$ polymerase recognizes the start signal region in prokaryotes.
$R$: Promoter region lies at $5'$ end of the coding strand, not the template strand.