A student analyzes a genomic DNA sequence of 100 nucleotides in order to determine if it is part of a gene.When she translates the sequence beginning at the first nucleotide, she finds that the tenth codon is UAA.What should she do next?
A)Tell her professor that the sequence does not represent an exon.
B)Tell her professor that the sequence encodes a peptide with nine amino acids.
C)Translate the sequence in the other five reading frames.
D)Use the genomic DNA to make a cDNA of the sequence.

Question

Quizplus · Accepted Answer

The presence of a stop codon (UAA) in the first reading frame suggests that the sequence might not encode a full protein in that frame. To determine if the sequence could be part of a gene, the student should check the other reading frames for potential open reading frames (ORFs) that might encode a protein.

A Student Analyzes a Genomic DNA Sequence of 100 Nucleotides