MICROBIOLOGY LAB 5 QUIZ WITH VERIFIED SOLUTIONS
#18
Pink or red growth on mannitol salt agar compared to growth on a control plate
indicates: - correct answer The bacteria is most likely Staphylococcus species of
bacteria but not Staphylococcus aureus
Yellow growth on mannitol salt agar compared to growth on a control plate indicates: -
correct answer The bacteria is most likely Staphylococcus aureus
The purpose of macconkey agar is to select for the growth of gram-negative
microorganisms and differentiate lactose fermenting ability. (true or false) - correct
answer true
Differential media contains only the minimum nutrients requirements for microbial
growth. (true or false) - correct answer false
Selective media encourage the growth of certain microorganisms while inhibiting the
growth of others (true or false) - correct answer true
Carbon is essential to the structure of every organic compound. (true or false) - correct
answer true
Which of the following can be used as a way to differentiate between different microbial
type? - correct answer -nutrient requirement
-lack of inhibition by antibiotics
-all of the above
- colony morphology
Answer: all of the above
What is the differential agent in mannitol salt agar? - correct answer phenol red
What is the differential agent of macconkey agar? - correct answer lactose
No growth on macconkey agar while there is growth on the control plate? - correct
answer indicates gram-positive bacteria
Growth media that has an antibiotic that is used as an inhibitor and methyl red as a ph
indicator would be classified as a: - correct answer selective and differential
Growth media that uses an indicator to help differentiate microorganisms based on
certain characteristic is defined as: - correct answer differential media
Growth media that is composed of yeast, plant, or animal extracts is classified as: -
correct answer complex media
#18
Pink or red growth on mannitol salt agar compared to growth on a control plate
indicates: - correct answer The bacteria is most likely Staphylococcus species of
bacteria but not Staphylococcus aureus
Yellow growth on mannitol salt agar compared to growth on a control plate indicates: -
correct answer The bacteria is most likely Staphylococcus aureus
The purpose of macconkey agar is to select for the growth of gram-negative
microorganisms and differentiate lactose fermenting ability. (true or false) - correct
answer true
Differential media contains only the minimum nutrients requirements for microbial
growth. (true or false) - correct answer false
Selective media encourage the growth of certain microorganisms while inhibiting the
growth of others (true or false) - correct answer true
Carbon is essential to the structure of every organic compound. (true or false) - correct
answer true
Which of the following can be used as a way to differentiate between different microbial
type? - correct answer -nutrient requirement
-lack of inhibition by antibiotics
-all of the above
- colony morphology
Answer: all of the above
What is the differential agent in mannitol salt agar? - correct answer phenol red
What is the differential agent of macconkey agar? - correct answer lactose
No growth on macconkey agar while there is growth on the control plate? - correct
answer indicates gram-positive bacteria
Growth media that has an antibiotic that is used as an inhibitor and methyl red as a ph
indicator would be classified as a: - correct answer selective and differential
Growth media that uses an indicator to help differentiate microorganisms based on
certain characteristic is defined as: - correct answer differential media
Growth media that is composed of yeast, plant, or animal extracts is classified as: -
correct answer complex media
