The probe used to isolate a gene from a genomic library is often:
A) the ligand that binds to the protein.
B) its promoter region.
C) a portion of the mRNA of the gene.
D) All of the above.
E) None of the above.

Question

Quizplus · Accepted Answer

The probe used to isolate a gene from a genomic library is often a portion of the mRNA of the gene. This is because mRNA is a single-stranded complementary copy of the gene's DNA and contains specific nucleotide sequences. The probe is designed to hybridize, or bind, to the complementary nucleotide sequence on the DNA in the genomic library, allowing the gene to be isolated. The ligand that binds to the protein and the promoter region of the gene are not typically used as probes to isolate a gene from a genomic library.

The Probe Used to Isolate a Gene from a Genomic