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MCB 3020 EXAM 1 QUESTIONS AND ANSWERS
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MCB 3020 EXAM 1 QUESTIONS AND ANSWERS
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Name: Score:189 Multiple choice questions
Term 1 of 189
explain peripheral proteins
study the reactions, genetic make-up, basic pathways
interior,exterior, and across
loosely associated with the membrane and easily removed
the presence of flagella, endospores, and capsules
Term 2 of 189
what is acid-fast staining for
to analyze the genetic composition of the Specimen
to identify mycobacteria, which causes leprosy and TB(tuberculosis)
to measure the density of the specimen
to determine the age of the specimen
Term 3 of 189
microbes are uni or multi cellular?
prokaryotes and eukaryotes
both
counting chambers, electronic counters, and on membrane filters
true
,Term 4 of 189
explain phase-contrast microscope
can adjust to different densities and can view the specimen live
only works with fixed specimens
magnifies the specimen by a factor of 1000
uses ultraviolet light to visualize the specimen
Term 5 of 189
what did Robert Hooke contribute to microbiology?
He was a chef; invented the internet; discovered electricity.
He was a merchant; coined the term, "cell"; claimed that life was made up of cells, and
was the first to develop/use a microscope.
-Protect against host immune system (phagocytosis). -Protects against harsh
environment/chemicals. -Facilitates attachment to surfaces. -Facilitates motility of
gliding bacteria.
He was a scientist; discovered the theory of relativity; invented the telescope.
Term 6 of 189
bacteria that can turn into endospores?
bacillus which causes anthrax. 2: clostridium, which causes gangrene and botulism.
streptococcus, which causes strep throat
staphylococcus aureus, which causes skin infections
escherichia coli, which causes food poisoning
,Term 7 of 189
define dehydration
a carbon and a hydrogen
a chemical reaction that produces water as a byproduct
a process of adding water to a compound
a reaction resulting in the loss of water
Term 8 of 189
where in the cell membrane are proteins located?
structural, acid-fast, and gram
a region known as nucloid
interior,exterior, and across
-both made of similar polymers. -both carry similar chemical reactions. -prokaryotic
cells lack membrane-enclosed organelles (including a nucleus). -both have ribosome,
but in different sizes. -both may or not have cell wall. -peptidoglycan is found only in
prokaryotes. -endospores only found in prokaryotes. -both have similar cell membrane.
Term 9 of 189
bond that holds nucleotide together
glycosidic bond
hydrogen bond
phosphodiester bond
plasmids; mitochondria; chloroplasts
, Term 10 of 189
describe basic research microbiology
examine advanced applications in microbiology
analyze macroeconomic trends in microbiology
study the reactions, genetic make-up, basic pathways
explore philosophical implications of microbiology
Term 11 of 189
bacteria are what group of cells?
glycocalyx: network of polysaccharides extending from the surface of the cell, this
includes capsules and germ layers. capsules: well organized and not easily removed
from cell.
slime layers: similar to capsules except diffuse, unorganized and easily removed. s-
layers: regularly structured layers of protein or glycoprotein that are more common
among archaea (protects against osmotic stress)
prokaryotes; everything else: eukaryotes!
accumulation of requirements for growth; no net growth occurs here
false: they are!
Term 12 of 189
hallmarks of cells ( all cells have these)?
discovered the vaccine for smallpox; he notice that milkmaids never got sick; he
inoculated a patient with cowpox, and then with smallpox, and the patient never got sick.
He concluded that the cow version never effected humans, but protected against
smallpox.
optical density (the more light that's absorbed, the higher the optical density)
1: cell membrane. 2: DNA/ genetic material. 3: capacity to self-replicate. 4: capacity to
regulate flow of chemicals across the membrane. 5: all are made of the same polymers.
6: must have a supply of energy.
1: by maintaining an internal pH near neutrality. 2: by synthesizing proteins that provide
protection. 3: by changing the pH of their habitat by producing acidic or basic waste
products.
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