Which one of the following is correct

Options

A. Introns are present in mRNA and exons are present in tRNA
B. Codons are present in mRNA and anticodons in tRNA
C. Every intron is a set of three terminator codons
D. Exons are present in eukaryotes while introns are present in prokaryotes

Answer

B

Explanation

Both exons and introns are present in mRNA. There are many introns in eukaryotic mRNA. Some introns have non sense codons i.e. UAA, UAG and UGA. Both exons and introns present in eukaryote and only exon in prokaryote.