A gene expression microarray has
A)an entire genome of DNA,cut into hundreds of pieces,attached to a small plastic or glass square.
B)short pieces of DNA of known sequence attached to a small plastic or glass square.
C)short pieces of RNA of known sequence attached to a small plastic or glass square.
D)amino acids attached to a small plastic or glass square.

Question

Quizplus · Accepted Answer

A gene expression microarray uses short pieces of DNA of known sequence, also known as probes, which are attached to a small plastic or glass square. These probes are used to detect and measure the level of gene expression in a sample.

Option A is incorrect because a gene expression microarray does not use the entire genome, but rather specific probes for known genes. Option C is incorrect because RNA is not typically used as probes in a microarray. Option D is incorrect because amino acids are not used in microarray technology.

A Gene Expression Microarray Has