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Prokaryotes
All of the following are bacterial cell shapes EXCEPT:
A. tetrads.
B. bacilli.
C. cocci.
D. spirilla.
Snapping division is associated with which of the following?
A. Mycobacterium
B. Agrobacterium
C. Corynebacterium
D. Clostridium
Binary fission
A. results in the disappearance of the parental cell.
B. occurs in all prokaryotes.
C. ends with the replication of the cell's DNA.
D. is a sexual mode of reproduction.
Endospores are resistant to all of the following EXCEPT:
A. radiation.
B. boiling water.
C. bleach.
D. Endospores are resistant to all of these.
The archaea
A. can cause disease in humans and animals.
B. live in unusual habitats or generate unusual metabolic byproducts.
C. have the same cell wall composition as other prokaryotes.
D. are classified in one phylum.
All of the following are groups of archaea EXCEPT:
A. thermophiles.
B. methanogens.
C. halophiles.
D. pseudomonads.
All of the following are examples of low G+C Gram-positive bacteria EXCEPT:
A. Listeria.
B. Streptococcus.
C. Mycobacterium.
D. Mycoplasma.
The cyanobacteria were formerly known as
A. mycoplasmas.
B. actinomycetes.
C. purple sulfur bacteria.
D. blue-green algae.
Which of the following bacterial groups is known for its production of various toxins and endospores?
A. pseudomonads
B. clostridia
C. mycoplasmas
D. actinomycetes
What is unusual about the mycoplasmas?
A. They produce huge quantities of methane.
B. They can survive inside immune cells.
C. They do not have cell walls.
D. They move using axial filaments.
Which of the following can be a contaminant of milk and meat products?
A. Bacillus
B. Listeria
C. Lactobacillus
D. Streptococcus
Why are members of the bacterial genus Rhizobium important?
A. They convert atmospheric nitrogen into a form of nitrogen that is usable by plants.
B. They cause tumors in plants.
C. They are an important source of antibiotics.
D. They can be used to leach metals from low-grade ore.
Which of the following can be used in the genetic manipulation of plants?
A. Zoogloea
B. Nitrosomonas
C. Caulobacter
D. Agrobacterium
Which of the following is a parasite of other bacteria?
A. Myxobacteria
B. Bdellovibrio
C. Chlamydia
D. Spirochetes
All members of the Phylum Proteobacteria are
A. Gram-negative bacteria.
B. photosynthetic.
C. Gram-positive.
D. high G+C bacteria.
"Swamp gas" is associated with which of the following?
A. thermophiles
B. halophiles
C. methanogens
D. phototrophs
Which of the following bacterial groups is known for its unique life cycle, distinguished by the
generation of differentiated reproductive structures?
A. Myxobacteria
B. Pseudomonads
C. Bacteroids
D. Mycoplasmas
The most common type of asexual reproduction is
A. budding.
B. fragmentation.
C. sporulation.
D. binary fission.
Which of the following is a group of bacteria that resemble fungi in their growth characteristics?
A. Pseudomonads
B. Corynebacteria
C. Chlamydias
D. Actinomycetes
The largest and most diverse group of proteobacteria is the
A. deltaproteobacteria.
B. gammaproteobacteria.
C. betaproteobacteria.
D. alphaproteobacteria.