DNA microarrays
A) are limited in the number of genes they can examine, compared with RT-PCR.
B) determine relative expression level of a large number of genes that are transcribed.
C) use a single oligonucleotide placed in all wells of a "gene chip" to probe for DNA hybridization.
D) are used to analyze the expression of noncoding regions of DNA.
E) detect proteins that are translated.

Question

Quizplus · Accepted Answer

DNA microarrays can determine the relative expression level of a large number of genes that are transcribed, making them a powerful tool for studying gene expression. While they may be limited in the number of genes they can examine compared with RT-PCR, the ability to examine multiple genes in a single assay is a major advantage of microarrays. Microarrays do not detect proteins or analyze noncoding regions of DNA. They use multiple oligonucleotides placed in specific locations on a gene chip to probe for DNA hybridization.

DNA Microarrays