BIOL 3201 Lab 4
selective medium - Answer a culture medium with an ingredient that inhibits the growth of
microbes other than the one being sought
NaCl and Mannitol salt agar selects for the genus - Answer Staphylococcus aureus
differential medium - Answer a solid culture medium that makes it easier to distinguish
colonies of the desired organism
the presence of ________ is one way to differentiate aerotolerant bacteria from aerobes or
facultative anaerobes - Answer catalase
Bile Esculin Agar is - Answer selective and differential
catalase breaks hydrogen peroxide down to - Answer oxygen and water
Nitrate Reduction Test - Answer differentiates microorganisms based on their ability to reduce
nitrate to nitrite or ammonia or nitrogenous gas
positive nitrate reduction test - Answer red coloration after the addition Nitrate A and B
reagents or no color change after the addition of zinc
In a phenol red carbohydrate tube, the presence of ____ is indicated by a color change of the
pH indicator phenol red. - Answer acid
A/an ____ medium contains substances that cause some bacteria to take on an appearance that
distinguishes it from other bacteria. - Answer differential
Staphylococcus aureus is the only Staphylococcus species in the lab reading that gives a positive
coagulase result. - Answer True
Reagent used with starch hydrolysis. - Answer iodine
Reagent used to test for catalase enzyme. - Answer hydrogen peroxide
A medium that allows certain bacteria to grow but inhibits other bacteria. - Answer Selective
medium
selective medium - Answer a culture medium with an ingredient that inhibits the growth of
microbes other than the one being sought
NaCl and Mannitol salt agar selects for the genus - Answer Staphylococcus aureus
differential medium - Answer a solid culture medium that makes it easier to distinguish
colonies of the desired organism
the presence of ________ is one way to differentiate aerotolerant bacteria from aerobes or
facultative anaerobes - Answer catalase
Bile Esculin Agar is - Answer selective and differential
catalase breaks hydrogen peroxide down to - Answer oxygen and water
Nitrate Reduction Test - Answer differentiates microorganisms based on their ability to reduce
nitrate to nitrite or ammonia or nitrogenous gas
positive nitrate reduction test - Answer red coloration after the addition Nitrate A and B
reagents or no color change after the addition of zinc
In a phenol red carbohydrate tube, the presence of ____ is indicated by a color change of the
pH indicator phenol red. - Answer acid
A/an ____ medium contains substances that cause some bacteria to take on an appearance that
distinguishes it from other bacteria. - Answer differential
Staphylococcus aureus is the only Staphylococcus species in the lab reading that gives a positive
coagulase result. - Answer True
Reagent used with starch hydrolysis. - Answer iodine
Reagent used to test for catalase enzyme. - Answer hydrogen peroxide
A medium that allows certain bacteria to grow but inhibits other bacteria. - Answer Selective
medium
