What process removes introns from mRNA?

a Replication

b

Transcription

C

Translation

d Splicing

Answer: d) Splicing

Explanation: The nucleotide sequence of most eukaryotic genes contain one or more intervening segments of DNA that do not code for the amino acid sequence of a polypeptide product. These intervening segments of DNA are called introns. Introns interrupt the colinear relationship between the nucleotide sequence of the gene and the amino acid sequence of the polypeptide it encodes.

A newly synthesized mRNA (RNA) molecule is called a primary transcript and it contains both introns and exons. Introns are the sequences that do not encode any polypeptide while exons are the coding segments.

Introns are removed from the mRNA (primary transcript) through a process known as splicing. Splicing is a process by which introns are removed from the mRNA strand and exons are joined to form a continuous sequence that specifies a functional polypeptide.