Final Exam- MICRO BIOLOGY
QUESTIONS AND ANSWERS
A bacterial chromosome is located in which of the following?
a.the nucleoid region
b.the nucleus
c.the thylakoids
d.the capsule - ANS>>a.the nucleoid region
A bacterium possessing a tuft of flagella at one end of its cell is called
a.Lophotrichous
b.Peritrichous
c.Monotrichous
d.Amphitrichous - ANS>>Lophotrichous
Acid-fast cell walls contain high concentrations of
a.peptidoglycan
b.teichoic acid
c.mycolic acid
d.pseudomurein - ANS>>mycolic acid
All of the following are found in the cell walls of gram-positive bacteria EXCEPT
__________.
a.teichoic acid
b.peptidoglycan
c.lipoteichoic acid
d.lipid A - ANS>>Lipid A
Bacteria divide by
a.binary fission
b.Mitosis
c.spore formation
d.Budding - ANS>>Bynary fission
Chemotaxis refers to the ability of microorganisms to __________.
a.survive under adverse conditions
b.attach to solid surfaces
c.move in a wavelike motion
d.move toward or away from chemical stimuli - ANS>>move toward or away from
chemical stimuli
Elementary bodies are found in the phylum
a.Chlamydiae
,b.Chloroflexi
c.Planctomycetes
d.Bacteroidetes - ANS>>Chlamydiae
Enteric bacteria would most likely be found in which environment?
a.warm, tropical soil
b.intestinal tract of an animal
c.human skin
d.unpasteurized milk and apple juice - ANS>>intestinal tract of an animal
In chloroplasts, chlorophyll is contained in flattened sacs called
a.Cisternae
b.Vacuoles
c.Cristae
d.Thylakoids - ANS>>Thylakoids
Peptic ulcers in humans are commonly caused by members of the genus
a.Shigella
b.Enterobacter
c.Helicobacter
d.Salmonella - ANS>>helicobacter
Rickettsias differ from chlamydias in that only rickettsias
a.form spores
b.are intracellular parasites
c.are Gram-negative
d.require an arthropod for transmission - ANS>>require an arthropod for transmission
Spherical bacteria that divide and remain attached in chainlike patterns are called
__________.
a.Staphylococci
b.Tetrads
c.Streptococci
d.Spirochetes - ANS>>Streptococci
The two domains of prokaryotes are
a.Bacteria and Protista
b.Archaea and Fungi
c.Bacteria and Archaea
d.Bacteria and Fungi - ANS>>Bacteria and Archaea
What are the sizes of two subunits used to compose prokaryotic ribosomes?
a.30S + 50S
b.30S + 40S
c.20S + 50S
d.40S + 60S - ANS>>30S + 50S
,Which is NOT true of the rickettsias?
a.They are classified as beta-proteobacteria
b.They are obligate intracellular parasites
c.They can cause human diseases often characterized by a rash
d.They are typically transmitted by insects and ticks - ANS>>They are classified as
beta-proteobacteria
Which member of the gammaproteobacteria is a potential cause of pneumonia and can
be found in warm-water supply lines and air conditioning cooling towers?
a.Legionella
b.Klebsiella
c.Coxiella
d.Salmonella - ANS>>Legionella
Which of the following genera is NOT a member of the phylum Actinobacteria?
a.Streptomyces
b.Lactobacillus
c.Propionibacterium
d.Mycobacterium - ANS>>lactobacillus
Which of the following is NOT a member of the order Enterobacteriales?
a.Salmonella
b.Pseudomonas
c.Shigella
d.Escherichia - ANS>>Pseudonomas
Which of the following is NOT an enteric?
a.Escherichia
b.Enterobacter
c.Campylobacter
d.Salmonella - ANS>>Campylobacter
Which of the following processes requires energy?
a.active transport
b.facilitated diffusion
c.simple diffusion
d.osmosis - ANS>>Active transport
Which of the following statements is TRUE for prokaryotes?
a.They are multicellular organisms
b.They generally lack organelles (such as nuclei)
c.Their cell walls are chemically simple
d.Their DNA is associated with histone proteins - ANS>>They generally lack organelles
(such as nuclei)
, Which of the following structures allows a cell to survive adverse environmental
conditions?
a.Endospore
b.Carboxysome
c.Capsule
d.Gas vacuole - ANS>>Endospore
Which one of the following is NOT a category of Archaea?
a.Halophiles
b.Low G + C gram-positive rods and cocci
c.Thermophiles
d.Acidophiles - ANS>>Low G + C gram-positive rods and cocci
The word Bacillus may refer to
a. rod-shaped cells
b. spherical cells
c. rod-shaped cells and a specific genus
d. a specific genus - ANS>>rod-shaped cells and a specific genus
Some bacteria stain gram-positive and others stain gram-negative because of
differences in the structure of their
a. capsule
b. endospore
c. cell wall
d. cell membrane - ANS>>cell wall
The parasite that causes African sleeping sickness is
a. Amoeba proteus.
b. Toxoplasma gondii.
c. Plasmodium vivax.
d. Trypanosoma brucei. - ANS>>Trypanosoma brucei.
Blunt, lobelike projections of cytoplasm that allow amebae to move are called
a. mitosomes
b. cytosomes
c. vacuoles
d. pseudopods - ANS>>pseudopods
Plasmodium, the cause of malaria, belongs to the phylum
a. Diplomonads.
b.Parabasalids.
c.Apicomplexa.
QUESTIONS AND ANSWERS
A bacterial chromosome is located in which of the following?
a.the nucleoid region
b.the nucleus
c.the thylakoids
d.the capsule - ANS>>a.the nucleoid region
A bacterium possessing a tuft of flagella at one end of its cell is called
a.Lophotrichous
b.Peritrichous
c.Monotrichous
d.Amphitrichous - ANS>>Lophotrichous
Acid-fast cell walls contain high concentrations of
a.peptidoglycan
b.teichoic acid
c.mycolic acid
d.pseudomurein - ANS>>mycolic acid
All of the following are found in the cell walls of gram-positive bacteria EXCEPT
__________.
a.teichoic acid
b.peptidoglycan
c.lipoteichoic acid
d.lipid A - ANS>>Lipid A
Bacteria divide by
a.binary fission
b.Mitosis
c.spore formation
d.Budding - ANS>>Bynary fission
Chemotaxis refers to the ability of microorganisms to __________.
a.survive under adverse conditions
b.attach to solid surfaces
c.move in a wavelike motion
d.move toward or away from chemical stimuli - ANS>>move toward or away from
chemical stimuli
Elementary bodies are found in the phylum
a.Chlamydiae
,b.Chloroflexi
c.Planctomycetes
d.Bacteroidetes - ANS>>Chlamydiae
Enteric bacteria would most likely be found in which environment?
a.warm, tropical soil
b.intestinal tract of an animal
c.human skin
d.unpasteurized milk and apple juice - ANS>>intestinal tract of an animal
In chloroplasts, chlorophyll is contained in flattened sacs called
a.Cisternae
b.Vacuoles
c.Cristae
d.Thylakoids - ANS>>Thylakoids
Peptic ulcers in humans are commonly caused by members of the genus
a.Shigella
b.Enterobacter
c.Helicobacter
d.Salmonella - ANS>>helicobacter
Rickettsias differ from chlamydias in that only rickettsias
a.form spores
b.are intracellular parasites
c.are Gram-negative
d.require an arthropod for transmission - ANS>>require an arthropod for transmission
Spherical bacteria that divide and remain attached in chainlike patterns are called
__________.
a.Staphylococci
b.Tetrads
c.Streptococci
d.Spirochetes - ANS>>Streptococci
The two domains of prokaryotes are
a.Bacteria and Protista
b.Archaea and Fungi
c.Bacteria and Archaea
d.Bacteria and Fungi - ANS>>Bacteria and Archaea
What are the sizes of two subunits used to compose prokaryotic ribosomes?
a.30S + 50S
b.30S + 40S
c.20S + 50S
d.40S + 60S - ANS>>30S + 50S
,Which is NOT true of the rickettsias?
a.They are classified as beta-proteobacteria
b.They are obligate intracellular parasites
c.They can cause human diseases often characterized by a rash
d.They are typically transmitted by insects and ticks - ANS>>They are classified as
beta-proteobacteria
Which member of the gammaproteobacteria is a potential cause of pneumonia and can
be found in warm-water supply lines and air conditioning cooling towers?
a.Legionella
b.Klebsiella
c.Coxiella
d.Salmonella - ANS>>Legionella
Which of the following genera is NOT a member of the phylum Actinobacteria?
a.Streptomyces
b.Lactobacillus
c.Propionibacterium
d.Mycobacterium - ANS>>lactobacillus
Which of the following is NOT a member of the order Enterobacteriales?
a.Salmonella
b.Pseudomonas
c.Shigella
d.Escherichia - ANS>>Pseudonomas
Which of the following is NOT an enteric?
a.Escherichia
b.Enterobacter
c.Campylobacter
d.Salmonella - ANS>>Campylobacter
Which of the following processes requires energy?
a.active transport
b.facilitated diffusion
c.simple diffusion
d.osmosis - ANS>>Active transport
Which of the following statements is TRUE for prokaryotes?
a.They are multicellular organisms
b.They generally lack organelles (such as nuclei)
c.Their cell walls are chemically simple
d.Their DNA is associated with histone proteins - ANS>>They generally lack organelles
(such as nuclei)
, Which of the following structures allows a cell to survive adverse environmental
conditions?
a.Endospore
b.Carboxysome
c.Capsule
d.Gas vacuole - ANS>>Endospore
Which one of the following is NOT a category of Archaea?
a.Halophiles
b.Low G + C gram-positive rods and cocci
c.Thermophiles
d.Acidophiles - ANS>>Low G + C gram-positive rods and cocci
The word Bacillus may refer to
a. rod-shaped cells
b. spherical cells
c. rod-shaped cells and a specific genus
d. a specific genus - ANS>>rod-shaped cells and a specific genus
Some bacteria stain gram-positive and others stain gram-negative because of
differences in the structure of their
a. capsule
b. endospore
c. cell wall
d. cell membrane - ANS>>cell wall
The parasite that causes African sleeping sickness is
a. Amoeba proteus.
b. Toxoplasma gondii.
c. Plasmodium vivax.
d. Trypanosoma brucei. - ANS>>Trypanosoma brucei.
Blunt, lobelike projections of cytoplasm that allow amebae to move are called
a. mitosomes
b. cytosomes
c. vacuoles
d. pseudopods - ANS>>pseudopods
Plasmodium, the cause of malaria, belongs to the phylum
a. Diplomonads.
b.Parabasalids.
c.Apicomplexa.
