A ________ is a single-stranded DNA molecule attached to a radioactive or fluorescent compound that is complementary to a specific sequence of DNA. Such pieces of DNA are used to identify and study cloned genes in hybridization experiments.
A) polypeptide
B) promoter
C) vector
D) probe
E) plasmid

Question

Quizplus · Accepted Answer

The description fits that of a DNA probe - a short, single-stranded DNA molecule labeled with radioactive or fluorescent molecules used to identify specific sequences of DNA. Polypeptides are chains of amino acids, promoters are DNA sequences that initiate transcription, vectors can refer to any DNA molecule used to transport genetic material, and plasmids are a specific type of circular DNA molecule used frequently in genetic engineering.

A ________ Is a Single-Stranded DNA Molecule Attached to a Radioactive