Multiple Choice Quiz


1	The term culture refers to the ______ growth of microorganisms in ________.
		A)	rapid, incubator
		B)	macroscopic, media
		C)	microscopic, the body
		D)	artificial, colonies


2	A mixed culture is
		A)	the same as a contaminated culture
		B)	one that has been adequately stirred
		C)	one that contains two or more known species
		D)	a pond sample containing algae and protozoa


3	Agar is superior to gelatin as a solidifying agent because agar
		A)	does not melt at room temperature
		B)	solidifies at 75C
		C)	is not usually decomposed by microorganisms
		D)	both a and c


4	The process that most accounts for magnification is
		A)	a curved glass surface
		B)	refraction of light
		C)	illumination
		D)	resolution


5	A subculture is a
		A)	colony growing beneath the media surface
		B)	culture made from a contaminant
		C)	culture made in an embryo
		D)	culture made from an isolated colony


6	Resolution is ______ with a longer wavelength of light
		A)	improved
		B)	worsened
		C)	not changed
		D)	not possible


7	A real image is produced by the
		A)	ocular
		B)	objective
		C)	condenser
		D)	eye


8	A microscope that has a total magnification of 1500X with the oil immersion lens has an ocular of what power?
		A)	150X
		B)	1.5X
		C)	15X
		D)	30X


9	The specimen for an electron microscope is always
		A)	stained with dyes
		B)	sliced into thin sections
		C)	killed
		D)	viewed directly


10	Motility is best seen with a
		A)	hanging drop preparation
		B)	negative stain
		C)	streak plate
		D)	flagellar stain


11	Bacteria tend to stain more readily with positively charged dyes because bacteria
		A)	contain large amounts of alkaline substances
		B)	contain large amount of acidic substances
		C)	are neutral
		D)	have thick cell walls

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