What is an open reading frame (ORF)?
A) a protein coding sequence plus associated regulatory sequences
B) the sequence between and including a start codon and a stop codon
C) the sequence between and including a start codon and a stop codon, minus the introns
D) the sequence between and including a start codon and a stop codon, minus the exons
E) the sequence between a start codon and stop codon in prokaryotes only

Question

Quizplus · Accepted Answer

An open reading frame (ORF) is defined as the sequence between and including a start codon and a stop codon, which potentially encodes a protein. It does not specifically exclude introns or exons nor is it exclusive to prokaryotes.

What Is an Open Reading Frame (ORF)