BIOD 171 EXAM 4 WITH 100% CORRECT
ANSWERS 2026
true or false; growth media is best suited for distinguishing between two similar
species of bacteria correct answer false
growth media is designed to support and not restrict microbial growth
true or false; differential media us best suited for distinguishing between two
similar species of bacteria correct answer true
A researcher is asked to determine if a sample contains Neisseria meningitides.
Knowing Neisseria meningitides is slow growing and other foreign microbes may
also be present in the culture, which type of media would be best suited?
a. growth media
b. selective media
c. selective and differential media
d. differential media correct answer B
a researcher is asked to determine which of two vitals contain E. coli and which
contains Salmonella. knowing both are gram-negative, while only one of them is
capable of fermenting lactose, which type of media would best be suited
a. selective and differential
b. selective
, c. growth media
d. differential correct answer D
what are the requirements for a fastidious microbe correct answer an organism
with complex growth requirements that will not grow if absent
enriched media must contain these specific nutrients
true or false; LB agar is classified as a non-selective, non-differential media
correct answer true
the polysaccharide-based hardening agent added to LB media to produce LB agar
is derived from what correct answer seaweed extract
blood agar is which type of medium? select all that apply.
a. differential
b. selective
c. enriched
d. selective and differential correct answer A and C
match the following hemolytic class with its description of activity
1. alpha hemolysis
2. beta hemolysis
3. gamma hemolysis
ANSWERS 2026
true or false; growth media is best suited for distinguishing between two similar
species of bacteria correct answer false
growth media is designed to support and not restrict microbial growth
true or false; differential media us best suited for distinguishing between two
similar species of bacteria correct answer true
A researcher is asked to determine if a sample contains Neisseria meningitides.
Knowing Neisseria meningitides is slow growing and other foreign microbes may
also be present in the culture, which type of media would be best suited?
a. growth media
b. selective media
c. selective and differential media
d. differential media correct answer B
a researcher is asked to determine which of two vitals contain E. coli and which
contains Salmonella. knowing both are gram-negative, while only one of them is
capable of fermenting lactose, which type of media would best be suited
a. selective and differential
b. selective
, c. growth media
d. differential correct answer D
what are the requirements for a fastidious microbe correct answer an organism
with complex growth requirements that will not grow if absent
enriched media must contain these specific nutrients
true or false; LB agar is classified as a non-selective, non-differential media
correct answer true
the polysaccharide-based hardening agent added to LB media to produce LB agar
is derived from what correct answer seaweed extract
blood agar is which type of medium? select all that apply.
a. differential
b. selective
c. enriched
d. selective and differential correct answer A and C
match the following hemolytic class with its description of activity
1. alpha hemolysis
2. beta hemolysis
3. gamma hemolysis
