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80 terms


introduction to micro
The microorganisms that do not have a nucleus in their cells are called:
Which activity is an example of biotechnology
humans using yeast to make beer and wine
Koch's postulates are criteria used to establish that:
a specific microbe is the cause of a specific disease
Helmiths are
parasitic worms
organisms called parasites are:
always harmful to the host
all of teh following pertain to the atom14/6 C except
has 14 neutrons
what is the maximum number of electrons in the second energy shell of an atom?
which of the following represents a synthesis reaction
A+B-----> AB
One nucleotide contains:
all of the choices are correct
All of the following are processes that define life except
the ability to invade host cells
which of the following is essential for development of discrete, isolated colonies
solid media
If a microbiologist studying a specimen at a total magnification of 950X, what is the magnifying power of the objective lens if the ocular lens is 10X?
This microscope achieves the greatest resolution and highest magnification:
The gram stain acid fast stain and endospore stain have the following in common
are differential stains
A microbiologist makes a fixed smear of bacterial cells and stains them with loeffler's methylene blue. All the cells appear blue under the oil lens. This is an example of
simple staining
Spirochetes have a twisting and flexing locomotion due to appendages called
periplasmic flagella
The transfer of genes during bacterial conjugation involves rigid, tubular appendages called
sex pili
All of the following structures contribute to the ability of pathogenic bacteria to cause disease
the bacterial chromosome
is part of the nucleoid
Endospores are
all the choices are correct
Protists include
all the choices are correct
histones are
proteins associated with DNA in the nucleus
The eucaryotic cell's glycocalyx is
mostly polysachharide
Organelles found in algae but not found in protozoa or fungi are the
the cytoskeleton
all of the choices are correct
larvae and eggs are developmental forms of
Which of the following represents a virus family name
Helical and icosahedral are terms used to describe the shapes of a virus
The correct sequence of events in viral multiplication is
adsorption, penetration, replication, assembly, maturation, release
Host range is limited by
type of host cell receptors on cell membrane
oncogenic viruses include all the following except
measles virus
infectionous protein particles called
microorganisms require small quantities of the nutrient for enzyme function and maintenance of protein structure:
trace element
An important mineral ion of the cytochrome pigments of cellular respiration is
The type of photosynthesis that does not produce oxygen;
occurs in certain bacteria
A microorganism that has an optimum growth temp at 37 C but can survive short exposure to high temps is a
the time interval from parent cell to two new daughter cells is called the
generation time
An apoenzyme
contains the active site
a holoenzyme is a combination of a protein and one or more substances called:
Most electron carriers are
all of the following are exoenzymes except
ATP synthase
When glucose is broken down by glycolysis during bacterial fermentation, how many atp are generated?
Electrons are ejected from atoms in cells when organisms are exposed to
gamma rays and X rays
which of the following is not a heavy metal
tincture of iodine
all of the following are alkylating control agents except
all the following act as a surfactants except
Ethylene oxide is
antibiotics are derived from all the following except
Penicillins and cephalosporins
damage cell membranes
the drug used for several protozoan infections is
antivirals that target reverse transcriptase would be used to treat
Acyclovir is used to treat
herpes zoster virus
Endogenous infectious agents arise from microbes that are
the patients own normal flora
which genus is resident flora of the mouch, large intestine, and from puberty to menopause, the vagina
microbial hyaluronidase, cogulase, and streptokinase are examples of
Nosocomial infections involve all the following except
are only transmitted by medical personnel
when would koch's postulates be utilized:
determination of the cause of a patient's illness in a hospital microbiology lab
temp 15-0C cant grow above 20. COLD
Protists include
Algae and protozoa
The eucaryotic cells glycocalyx is
mostly polysachrides
Organelles found in algae but not protozoa or fungi are
The cytokeleton
all of these are correct
which is not a characteristic of fungi
cell walls are not found on typical cells of
infectionous naked strands of RNA called
Creutzfeild jacobs disease is
a spongiform encephelopathy of humans
which microorganisms find hypotonic conditions most detrimental
a halophile grows best in
a salt lake
enzymes that are produced when substrates is present are
induced enzymes
alcohol fermentation produces
alcohol and CO2
what test is used for testing infectious dose
Kirby bauer test
whats a HEPA test for
all are correct
Physical agents for controlling microbes growth includes all but
hydrogen peroxide
Dry heat
is less effective than most
Easiest microbes to kill
chemicals that produced highly reactive radicals
hydrogen peroxide
penicillans and cephalosporins
block peptides that cross link glycon molecules
side effects in patients tissues
development of resistance to dmg
knochs postulates
determination of cause new disease in a lab
the doughnut