When microarrays are used to study gene expression patterns, each spot on a microarray contains thousands of copies of
A) an oligonucleotide, with the same oligonucleotide in all spots.
B) an oligonucleotide, with different oligonucleotides in different spots.
C) a plasmid, with the same plasmid in each spot.
D) a plasmid, with different plasmids in different spots.
E) an expression vector, with different expression vectors in different spots.

Question

Quizplus · Accepted Answer

In microarrays used to study gene expression patterns, each spot contains a different oligonucleotide sequence that corresponds to a specific gene. By measuring the amount of fluorescence in each spot, the level of gene expression can be inferred. Therefore, choice B is the correct answer as it states that each spot has a different oligonucleotide sequence.

When Microarrays Are Used to Study Gene Expression Patterns, Each