BIO 320 EXAM 1 2026 UPDATE
QUESTIONS AND CORRETCT VERIFIED
ANSWERS ALREADY GRADED A+
(BRAND NEW VERSION)
A packet of cells would be formed by cocci dividing: - ANS-along three
perpendicular axes.
A prokaryotic group that exists as a multicellular form is the: - ANS-
actinobacteria.
Which of the following is found in a prokaryotic cell? - ANS-Cytoplasmic
membrane
Which of the following is not a characteristic of endospores? - ANS-
Susceptible to UV radiation
The primary function of gas vesicles is to - ANS-allow aquatic
microorganisms to modify their density.
You are asked to determine whether an unknown bacterial sample
contains a gram-positive or gram-negative species. Because you are all
out of Gram staining reagents, you decide to analyze the chemical
components of the cell wall. The presence of which of the following
components would serve as a marker for a gram-negative bacterium? -
ANS-Diaminopimelic acid
The strength of peptidoglycan resides in - ANS-both sugar polymers
and peptide linkages
Due to its hydrophilic channels porins allow the passage of - ANS-
Inorganic ion Amino acids Sugars Small water soluble nutrients
, Almost all biologically produced amino acids found in bacteria are in the L-
stereo configuration with the exception of those found in BLANK which
contain(s) D-amino acids. - ANS-the cell wall and capsules
Which of the following is a function of pili? - ANS-to enable cell to move
by bending To help cells attach to surfaces To serve as a channel
for DNA transfer between cells To serve as a pathogenic Factor
A microorganism's ability to use a harmful pesticide as a source of carbon
and energy is an example of - ANS-bioremediation
Autotrophs and heterotrophs differ in - ANS-their ability to utilize CO2 as a
sole carbon source.
If the amino acid valine constituted approximately 4% of the total cell
protein of a bacterium how much valine should be added to a defined
medium in order to grow 1 gram of this organism? Protein makes up about
50% of the bacterial cell. - ANS-20 mg
Transport of HPO4 along with a proton (H+) is an example of - ANS-
symport
The energy required for transport via ABC transporters is derived from -
ANS-ATP hydrolysis
The spread plate method would clearly be preferred over the pour plate
method when isolating colonies of - ANS-bacteria form temperate lake
zones
Enrichment culture procedures for many microorganisms require intial
growth in liquid media followed by growth on solid media. The solid media
is used to - ANS-isolate single colonies of the microbes
QUESTIONS AND CORRETCT VERIFIED
ANSWERS ALREADY GRADED A+
(BRAND NEW VERSION)
A packet of cells would be formed by cocci dividing: - ANS-along three
perpendicular axes.
A prokaryotic group that exists as a multicellular form is the: - ANS-
actinobacteria.
Which of the following is found in a prokaryotic cell? - ANS-Cytoplasmic
membrane
Which of the following is not a characteristic of endospores? - ANS-
Susceptible to UV radiation
The primary function of gas vesicles is to - ANS-allow aquatic
microorganisms to modify their density.
You are asked to determine whether an unknown bacterial sample
contains a gram-positive or gram-negative species. Because you are all
out of Gram staining reagents, you decide to analyze the chemical
components of the cell wall. The presence of which of the following
components would serve as a marker for a gram-negative bacterium? -
ANS-Diaminopimelic acid
The strength of peptidoglycan resides in - ANS-both sugar polymers
and peptide linkages
Due to its hydrophilic channels porins allow the passage of - ANS-
Inorganic ion Amino acids Sugars Small water soluble nutrients
, Almost all biologically produced amino acids found in bacteria are in the L-
stereo configuration with the exception of those found in BLANK which
contain(s) D-amino acids. - ANS-the cell wall and capsules
Which of the following is a function of pili? - ANS-to enable cell to move
by bending To help cells attach to surfaces To serve as a channel
for DNA transfer between cells To serve as a pathogenic Factor
A microorganism's ability to use a harmful pesticide as a source of carbon
and energy is an example of - ANS-bioremediation
Autotrophs and heterotrophs differ in - ANS-their ability to utilize CO2 as a
sole carbon source.
If the amino acid valine constituted approximately 4% of the total cell
protein of a bacterium how much valine should be added to a defined
medium in order to grow 1 gram of this organism? Protein makes up about
50% of the bacterial cell. - ANS-20 mg
Transport of HPO4 along with a proton (H+) is an example of - ANS-
symport
The energy required for transport via ABC transporters is derived from -
ANS-ATP hydrolysis
The spread plate method would clearly be preferred over the pour plate
method when isolating colonies of - ANS-bacteria form temperate lake
zones
Enrichment culture procedures for many microorganisms require intial
growth in liquid media followed by growth on solid media. The solid media
is used to - ANS-isolate single colonies of the microbes
