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Straighterline BIO250 Final exam 2024
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Straighterline BIO250 Final exam 2024
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Straighterline BIO250 Final exam 2024phylogeny - ANSWER The study of evolutionary relationships among organisms is
called
Last Universal Common Ancestor - ANSWER The three cell types discussed
eukaryotes archaea and bacteria all derived from
Valways harmful to their host - ANSWER Organisms called parasites are
Thermal hot springs warmed by heat from earth's interior - ANSWER Which of the
following does not indicate microbe involvement in energy and nutrient flow ?
Electrons - ANSWER The subatomic particles that surround the nucleus are the
answer✔✔respiratory disease - ANSWER The number one worldwide infectious
diseases are
answer✔✔saturated - ANSWER A fat is called if all carbons of the fatty acid
chain are single bonded to 2 other carbons and 2 hydrogens
answerlipid - ANSWER One technique for staining bacteria for viewing under the
microscope is called the Gram stain In this technique , alcohol is used as a
decolorizer because it degrades the outer membrane found in some bacteria . What
chemical component of the cell does alcohol affect ? -
95x - ANSWER If a microbiologist is studying a specimen at a total magnification of
950X , what is the magnifying power of the objective lens if the ocular lens is 10X
cell size of 0.5 to 2 microns - ANSWER NASA has published a list of criteria for
identifying fossil bacteria of a search for evidence of life Which of the following is
good evidence for the presence of in samples from Mars , as par bacterial cells ?
electron - ANSWER Which type of microscope achieves the greatest resolution
and highest magnification ?
solid medium - ANSWER Which of the following is produced by adding 1 % to 5 %
agar to nutrient broth that is then boiled and cooled ? -
Creutzfeldt Jacob disease - ANSWER a spongiform encephalopathy of humans
Amphitrichous - ANSWER The term that refers to flagella at both poles of the cell
is?
, answer✓✓saprobe - ANSWER In the condition called athlete's foot , the fungus
Trichophyton consumes the keratin does not apply to protein found in hair , nails ,
and dead skin . Which of the following descriptors Trichophyton
gram - negative - ANSWER During the Gram stain , the application of alcohol
results in the decolorization of cells.-
80s - ANSWER The size of a eukaryotic ribosome is
Bacterial cells are typically between 1-10 μm and are blocked by the filter , whereas
most viruses are between 20 and 200 nm and therefore pass through . - ANSWER
Sterilizing filters have a pore size of 0.22 μm . Which of the following statements is
true ?
Vicosahedral - ANSWER One of the principal viral capsid shapes is a 20 sided
figure with 12 evenly spaced corners referred to as a / an capsid
answer✓✓fecal oral - ANSWER Amoebic dysentery is most commonly contracted
through
answer✓✓lysogeny - ANSWER the viral genome inserting into bacterial host
chromosome
answer✔✔envelope - ANSWER Which of the following is not associated with
every virus
answer✓✓palisade - ANSWER When bacilli in a chain fold back upon each other
like a hinge this cellular arrangement is termed a
answer✔✔histones - ANSWER proteins associated with DNA in the nucleus .
answer✓✓tropisms - ANSWER Viral tissue specificities are called
lophotrichous - ANSWER the term that refers to the presence of a tuft of flagella
emerging from a single site is
answer✓✓mutualistic - ANSWER E. coli bacteria normally live in the human gut
and produce vitamin K that the body uses . This is best termed a
answer✓✓mutualistic - ANSWER Termites are insects that require the protozoan
Trichonympha in their gut to synthesize the enzyme cellulase to degrade the
cellulose in wood . The protozoan uses the end products of the cellulose breakdown
( glucose ) . This is a ( n ) . relationship
Lag phase - ANSWER The phase of the bacterial growth curve in which newly
inoculated cells are adjusting their new environment , metabolizing but not growing
at an exponential rate , is the?
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