Choose the best answer

1			The deinococci are gram-positive cocci and rods that are distinctive in their unusually great resistance to
			A)	radiation.
			B)	desiccation.
			C)	radiation and desiccation.
			D)	extreme temperatures
2			Which of the following is not a group of photosynthetic bacteria?
			A)	the green bacteria
			B)	the purple bacteria
			C)	the cyanobacteria
			D)	All of these are groups of photosynthetic bacteria.
3			The infectious stage of chlamydiae is called a(n) _________ body.
			A)	elementary
			B)	reticulate
			C)	contagious
			D)	oogonial
4			Cyanobacteria are procaryotes but carry out oxygenic photosynthesis like eucaryotes in that they:
			A)	use water as their electron source.
			B)	produce oxygen as a by-product of photosynthesis.
			C)	Both of these answers are correct.
			D)	Neither of these answers is correct.
5			Cyanobacteria have
			A)	a gram-negative cell wall.
			B)	a gram-positive cell wall.
			C)	an unique cell wall that is neither gram positive nor gram negative.
			D)	no cell walls.
6			Some bacterial groups, such as the ___________ are deeply branching and very old.
			A)	hyperthermophiles, Thermotogoa and Aquifex
			B)	Cyanobacteria
			C)	Spirochetes
7			Bacteroides constitute as much as ______% of the bacteria isolated from human feces.
			A)	10%
			B)	20%
			C)	30%
			D)	40%
8			Cyanobacteria are frequently the photosynthetic partner in ________ associations.
			A)	mycorrhizal
			B)	rhizobial
			C)	lichen
9			The spirochetes include the causative agents for
			A)	syphilis
			B)	Lyme disease
			C)	both syphilis and Lyme disease.
			D)	neither syphilis nor Lyme disease.
10			The bacteriochloropyll pigments of purple and green bacteria enable them to live in
			A)	saline environments
			B)	deeper, anaerobic zones of aquatic habitats.
			C)	shallow, warm aquatic habitats