Question

Intron is a
a. functional sequence
b. non-coding sequence
c. characteristic of prokaryotic genome
d. characteristic of eukaryotic genome

• A. b, d
• B. a, b, c, d
• C. b, c, d
• D. a, b, c

Answer 1

The correct option is A b, d

Intron is noncoding sequence of an RNA transcript or a non-coding sequence of DNA. It is present only in eukaryotic genome and not in prokaryotes.

Exon is a coding sequence of DNA or the corresponding sequence in RNA transcript present in both eukaryotes and prokaryotes.

Gene is a functional segment of DNA (or the corresponding sequence of RNA) that can consists of both exons and introns in eukaryotes but only exons in prokaryotes.