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Micro exam 1

Terms in this set (42)

Spontaneous generation is the belief that
a)germs cause infectious diseases
b)microbes are diverse and uniquitous
c)microbes placed in an infusions can grow in it
d)living things arise from nonliving matter
living things arise from nonliving matter
Which of the following used carbolic acid to disinfect surgical suite and made surgery a much safer procedure due to the decrease in patients dying of infected surgical wounds
a)John Snow
b)Robert Koch
c)Joseph Lister
d)Ignaz Semmelweis
Joseph Lister
The study of algae is called
a)phycology
b)mycology
c)protozoology
d)virology
phycology
The 3-domain representation of life on earth does not include
a)fungi
b)protozoa
c)bacteria
d)viruses
viruses
A friend comments to you that all bacteria should be killed to make the world safer. Which of the following would result if such an action were carried out?
a)people would be free of all disease
b)plants would be free of all disease
c)drugs could no longer be produced
d)eventually all other organisms will die
eventually all other organisms will die
You are examining a drop of aquarium water under the microscope and observing green cells with nuclei. You conclude that the cells represent an organism belonging to Domain
a)Bacteria
b)Archea
c)Eucarya
D)none of the above
Eucarya
Which of the following is a scientific name?
a)Philadelphia fever
b)Legionella pnuemophilia
c)legionnaries bacterium
d)Legionnaries disease
Legionella pnuemophilia
Basic microbiology can be used for
a)study the structure of a microbe
b)study of the physiology of a microbe
c)both A and B
d)neither A nor B
study of the physiology of a microbe
The most inclusive taxonomic level shown below is
a)species
b)genus
c)family
d)phylum
phylum
Microbes may be beneficial and detrimental
a)true
b)false
true
You are studying the cell wall of an organism. Which of the following would indicate that the it is an archeabacterium.
a)presence of NAM
b)presence of DAP
c)presence of dipicolinic acid
d)presence of NAT
presence of NAT
An infection in a patient possessing an indwelling unit is found to be difficult to cure because of the present of a thick layer of bacteria adhered to the surface of the unit. The bacteria are using which of the following to adhere to the unit?
a)cell wall
b)lipopolysaccharide
c)glycocalyx
d)flagella
lipopolysaccharide
In the cell membrane of Domain Eukarya and Bacteria, phospholipids are arranged in
a)a monolayer
b)a bilayer
c)multiple layers
a bilayer
Hopaniods are important to Bacterial cells because they are likely
a)provides membrane stability
b)transport molecules into the cell
c)are involved in cell recognition
d)enable the microbe to cause disease
provides membrane stability
The periplasm is an
a)part of the outer membrane of a gram negative bacteria
b)part of the cytoplasmic membrane of a gram negative bacteria
c)space between the cytoplasmic membrane and the outer membrane in gram negative bacteria
d)alternate name for the inner cell membrane of any prokaryotic cell
space between the cytoplasmic membrane and the outer membrane in gram negative bacteria
Lysozyme is an enzyme found in saliva that cleaves the B-1,4 linkage in peptidoglycan. What effect would the enzyme have on psuedopeptidoglycan?
a)the same
b)a moderate effect
c)no effect
no effect
Which of the following statements is false about eubacterial flagella?
a)it is composed of flagellin
b)the energy source is ATP
c)they mediate motility by rotating
d)they undergo runs and tumbles
the energy source is ATP
______________ is found only in the outer membrane of gram negative bacteria
a)Lipoteichoic acid
b)N-acetyltalosaminuronic acid
c)Lipopolysaccharide
d)Techoic acid
Lipopolysaccharide
Fiber like structures on the surface of bacteria that aid in attachment to surfaces
a)sex pilli
b)flagella
c)glycolyx
d)fimbriae
fimbriae
An amino acid found in the pentapeptide of the peptidoglycan of gram-negative bacteria
a)diaminopimelic acid
b)dipicolinic acid
c)L-lysine
d)teichoic
diaminopimelic acid
Which of the bacterial structure that acts as a selective barrier, allowing nutrients to enter the cell and wastes to leave the cell?
a)capsule
b)cell wall
c)pili
d)plasma membrane
plasma membrane
Which of the following traits do archaeans and bacteria share?
1.composition of the cell wall
2. presence of plasma membrane
3.lack of a nuclear envelope
4. identical rRNA sequence
2 and 3
Which of the following statements accurately describes membrane linkages
a)Eubacteria=ester linkages;archaea=ether linkages
b)Archaea=ester linkages;Eubacteria=ether linkages
c)Eubacteria=ester linkages;Eubacteria=ether linkages
a)Eubacteria=ester linkages;archaea=ether linkages
When studying peptidoglycan, which of the following should always be found
a)NAg
b)NAM
c)L-Lystine
d)D-alinine
e)A,B,D only
A,B,and D only
Lipid A is the toxic component of
a)peptidogylcan
b)Plasma membrane
c)outer membrane
d)glycocalyx
outer membrane
Removal of the cell wall would result in the bacterium
a)being susceptible to osmotic lysis
b)losing its shape
c)both A and B
d)neither A or B
both A and B
Which of the following would be found associated with Archaen?
a)Peptidoglycan
b)Sterol rich cell membranes
c)Nucleus
d)Pseudomurein
Pseudomurein
Assume you have a bacterial culture that requires teichoic acid in its growth medium. If teichoic acid is not provided, the bacteria will not be able to make:
a)plasma membranse
b)cell walls
c)ribosomes
d)capsules
cell walls
The glycocalyx of microbial cells has all of the following functions except
a)it keeps the microbe from drying out
b)it enhances the ability of pathogenic microbes to colonize surfaces
c)it provides a mechanism of attachment for the microbe
d)it enhances destruction of the microbe by immune cells
d)it enhances destruction of the microbe by immune cells
Aerotaxis implies that bacteria are
a)moving towards light
b)moving away from a magnetic feild
c)moving toward or away from oxygen
d)moving toward or away from a chemical
moving toward or away from oxygen
A scientist identifies an organism capable of forming endospores. Microscopy reveals coccal-shaped cells. What chemical substance should he test to determine if endospores are present?
a)diaminopimelic acid
b)Nam
c)dipicolinic acid
d)more than one could be utilized as an indicator
dipicolinic acid
Rigidity of cell wall is determined by
degree of crosslinking
The overall shape/morphology of a prokaryotic is governed by
a)cell wall
b)the cytoplasmic membrane
c)the type of lipopolysaccharide
d)amount of glycocalyx
cell wall
A cell was examined. The tetrapeptides were found to be linked by a peptide bond between L-Lysine and D-alanine. This cell was isolated from
a)achreabacterium
b)mycobacterium
c)gram-positive bacterium
d)gram-negative bacterium
gram-positive bacterium
The function of sex pili of Escherichia coli involves
a)transport of nutrients
b)attachment of cell to inhert surfaces
c)movement of cells in a type of twitching motion
d)transfer of DNA between bacteria during conjunction
transfer of DNA between bacteria during conjunction
36 and 37:
A water sample had linear hydrocarbon chains, a cholesterol-like molecule, and long chain of ribitol-linked phosphates. The soil contained the same except that an additional chemical was found in abundance. The chemical was dipicolinic acid.
36)the water sample contains
a)bacteria
b)Archea
c)Eucarya
d)at least two of the above
37)The soil sample contains an org with the following traits
a)a member of Bacillus spp.
b)and org capable of surviving drought
c)a gram-positive bacterium
d)all of the above
36)Bacteria
37)all of the above
Mycolic acid is found associated with
a)mycoplasma
b)mycobacterium
c)gram negative bacterium
d)eucaryotes
mycobacterium
NAG and NAM would not be found in
a)mycoplasma
b)mycobacterium
c) gram-negative bacterium
d)gram-positive bacterium
mycoplasma
Cells growing in the arrangement "staphylo" are growing in
a)chains
b)clusters
c)cubes
d)as single cells
clusters
Chloramphenicol, and antibiotic that inhibits bacterial protein synthesis, will also affect which of the following eukaryotic organelles?
a)mitochondria
b)goilgi apparatus
c)microtubles
d)endoplasmic reticulum
mitochondria
A bacterium who cell wall is loosely crosslinked is
a)flexible
b)rigid
c)semi-flexible
d)seni-rigid
flexible
All bacterium and algae will both have
a)cell wall
b)nucleus
c)cell membrane
d)flagella
cell membrane
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