A DNA Probe with a Sequence Similar to That of the Gene

Multiple Choice

A DNA probe with a sequence similar to that of the gene of interest is often used to screen a DNA library.What could you use as a probe if the sequence of the gene of interest is not known?

A) a similar gene from another organism
B) a synthetic probe,if the encoded amino acid sequence is known
C) either A or B
D) This screen is not possible until the DNA sequence of the gene of interest is known.