Question

Are introns non-coding?

Answer 1

Coding sequences

1. The sequences in the DNA or RNA that are used in protein synthesis are called coding sequences.
2. They are also called exons which are present in a mature RNA transcript.
3. These highly conserved sequences are found both in eukaryotes and prokaryotes.

Non-coding sequences

1. Those sequences present in DNA or RNA that are not used in protein synthesis are called non-coding sequences.
2. They are also called introns and are usually spliced and removed from a mature RNA transcript.
3. These sequences are not conserved and are found in eukaryotes only.
4. Intron sequences are transcribed into RNA but are later removed through splicing.