Synthesis of $m-RNA$ is

Which form of $RNA$ is most heterogeneous?

Which of the following statements are correctly related to the given diagram of transcription?
$(a)$ $A$ is the Coding strand
$(b)$ $A$ is the Non-coding strand
$(c)$ $B$ is the Antisense strand
$(d)$ $B$ is the Sense strand

Which mineral element is essential for the process of transcription?

Transcription is a process by which

Give an account of post-transcriptional modifications of a eukaryotic $mRNA$.