unit 3

Most of the oligotrophic (growing at low nutrient levels)  proteobacteria are found in the _________.

•   Beta-proteobacteria

• Alpha-proteobacteria

•   Delta-proteobacteria

•   Gamma-proteobacteria

The largest group of proteobacteria are the _________.

•   Beta-proteobacteria

• Alpha-proteobacteria

•   Delta-proteobacteria

•   Gamma-proteobacteria

Which of the following is extremely radiation resistant?

•   Deinococcus

•   Aquifex

•   Thermotoga

•   Caulobacter

Some cyanobacteria form_________, which are comprised of chains of bacterial cells that are in close contact with one another over a large area.

•   hypha

•   mycelia

• trichomes

•   cell mats

Members of the genus Mycobacterium cause which of the following diseases in humans? 

•   Tuberculosis and Leprosy

•   Abscesses

•   Diphtheria

•   Meningitis

Clostridium causes which of the following?        

•   Botulism

•   Pneumonia

•   Fire blight disease of pears

•   Tuberculosis

Bacteriophage that only exhibit lytic replication cycles are called_________phages.           

•   temperate

•   virulent

•   intemperate

•   lytigate

Defining features of the halobacteria include_________.

•   absolute dependence on temperatures above 65ºC for growth

•   the production of methane

•   absolute dependence on a high concentration of NaCl for growth

•   absolute dependence on low pH conditions for growth

All photosynthetic protists________.        

•   carry out oxygenic photosynthesis using two photosystems

•   carry out oxygenic photosynthesis using one photosystem

•   carry out anoxygenic photosynthesis using two photosystems

•   carry out anoxygenic photosynthesis using one photosystem

A typical Euglena cell is elongated and bounded by a_________.

•   celllose wall

•   pellicle

•   lipid monolayer

•   plasmalemma