Microbiology Ch. 11

Why are the deeply branching bacteria so named?
a. They are thought to be similar to the earliest bacteria
b. The term refers to their style of snapping division
c. They are the only bacteria that reproduce by budding
d. They grow as deeply branched filam

a. They are thought to be similar to the earliest bacteria

Which of the following bacterial genera is an important source of antibiotics?
a. Streptococcus
b. Staphylococcus
c. Streptomyces
d. Clostridium

c. Streptomyces

Which of the following performs photosynthesis in a manner most similar to that utilized by higher plants?
a. Halobacterium salinarium
b. Cyanobacteria
c. Purple sulfur bacteria
d. Green sulfur bacteria

b. Cyanobacteria

Which of the following does NOT always occur when bacteria undergo binary fission?
a. The cytoplasmic membrane elongates
b. A crosswall divides daughter cells
c. The DNA of the cell is replicated
d. Daughter cells separate from each other

d. Daughter cells separate from each other

All of the following are bacterial cell shapes EXCEPT:
a. Tetrads
b. Cocci
c. Spirilla
d. Bacilli

a. Tetrads

Which of the following is a parasite of other bacteria?
a. Spirochetes
b. Myxobacteria
c. Bdellovibrio
d. Chlamydia

c. Bdellovibrio

Snapping division is associated with which of the following?
a. Clostridium
b. Mycobacterium
c. Corynebacterium
d. Agrobacterium

c. Corynebacterium

Which of the following staining procedures is diagnostic for members of the bacterial genus Mycobacterium?
a. the simple stain
b. the acid-fast stain
c. the endospore stain
d. the Gram stain

b. the acid-fast stain

All of the following are arrangements associated with bacilli EXCEPT:
a. Palisades
b. Pairs
c. Chains
d. Clusters

d. Clusters

Which of the following bacterial groups is known for its production of various toxins and endospores?
a. Clostridia
b. Pseudomonads
c. Actinomycetes
d. Mycoplasmas

a. Clostridia

Which of the following is a psychrophilic food-borne pathogen?
a. Bacillus
b. Listeria
c. Lactobacillus
d. Streptococcus

b. Listeria

The cyanobacteria were formerly known as _____.
a. Purple sulfur bacteria
b. Blue-green algae
c. Mycoplasmas
d. Actinomycetes

b. Blue-green algae

What is unusual about the mycoplasmas?
a. They produce huge quantities of methane
b. They can survive inside immune cells
c. They move using axial filaments
d. They do not have cell walls

d. They do not have cell walls

Which of the following types of organisms would use inorganic carbon sources and obtain its energy from chemical reactions?
a. Chemoheterotroph
b. Photoheterotroph
c. Chemoautotroph
d. Photoautotroph

c. Chemoautotroph

The process by which some microbes convert atmospheric nitrogen to ammonia is called _____.
a. Nitrogen fixation
b. Transamination
c. Nitrogen synthesis
d. Chemiosmosis

a. Nitrogen fixation

Which of the following is NOT a method of asexual reproduction?
a. Meiosis
b. Sporulation
c. Binary fission
d. Snapping division
e. Budding

a. Meiosis

All members of the Phylum Proteobacteria are _____ bacteria.
a. Photosynthetic
b. Gram-negative
c. Gram-positive
d. High G+C

b. Gram-negative

Which of the following is often used in the genetic modifications of plants?
a. Nitrosomonas
b. Agrobacterium
c. Zoogloea
d. Caulobacter

b. Agrobacterium

All of the following are characteristics of the archaea EXCEPT:
a. Cell walls do not contain peptidoglycan
b. Membrane lipids with branched fatty acids
c. Frequently pathogenic to humans and animals
d. Often inhabit extreme environments

c. Frequently pathogenic to humans and animals

Why are members of the bacterial genus Rhizobium important?
a. They can be used to leach metals from low-grade ore
b. They cause harmful tumors in plants
c. They convert atmospheric nitrogen into a form of nitrogen that is usable by plants
d. They are an

c. They convert atmospheric nitrogen into a form of nitrogen that is usable by plants

All of the following are groups of archaea EXCEPT:
a. Methanogens
b. Halophiles
c. Thermophiles
d. Pseudomonads

d. Pseudomonads

The largest and most diverse group of proteobacteria is the _____.
a. Betaproteobacteria
b. Alphaproteobacteria
c. Gammaproteobacteria
d. Deltaproteobacteria

c. Gammaproteobacteria

Which of the following organisms is associated with the production of an important greenhouse gas?
a. Methanogens
b. Thermophiles
c. Halophiles
d. Phototrophs

a. Methanogens

Which of the following photosynthetic bacteria oxidizes hydrogen sulfide to elemental sulfur, which is then deposited outside of the cell?
a. Green sulfur bacteria
b. Purple sulfur bacteria
c. Purple nonsulfur bacteria
d. Green nonsulfur bacteria

a. Green sulfur bacteria

A gene for a naturally-occurring endotoxin from _____ has been cloned into some crop plants to protect them from insect pests.
a. Bacillus thuringiensis
b. Agrobacterium tumefaciens
c. Escherichia coli
d. Thermus aquaticus

a. Bacillus thuringiensis