Review the animation and answer the questions that follow to test your understanding.

1		A microarray is a
			A)	ray of a small wavelength
			B)	a type of ultraviolet ray
			C)	an RNA probe used to identify viruses
			D)	an arrangement of oligonucleotide probes, closely arranged on a small solid support surface
2		A microarray commonly contains _______ nucleotides.
			A)	1–5
			B)	5–15
			C)	15–25
			D)	25–100
			E)	100–500
3		When interpreting the results of microarrays, the degree of hybridization between a given probe and an organism to be identified is measured by
			A)	turbidity read in a spectrophotometer
			B)	color intensity of an image produced by scanning with a laser beam
			C)	length of the probe formed
			D)	degree of agglutination
			E)	microscopy
4		When building a microarray, we know the sequence of the oligonucleotides, but not their position.
			A)	True
			B)	False
5		Nucleotides are made to attach to the glass by a light activation reaction.
			A)	True
			B)	False