Bio 235 Exam 2 Questions with Correct
Answers
Biofilms -microbial communities
-form slime or hydrogels that adhere to surfaces
-share nutrients
-shelter bacteria from harmful environmental factors
-resistant to microbicides
-involved in 70% of infections
Culture medium nutrients prepared for microbial growth (agar)
Sterile no living microbes
Inoculum introduction of microbes into a medium
Culture microbes growing in or on a culture medium
, Agar complex polysaccharide
used as a solidifying agent
-not metabolized by microbes
-liquifies at 100 celsius
-solidifies at 40 celsius
-has beef in it (nutrients)
Chemically defined media exact chemical composition is known and the amount
Complex media extracts and digests of yeasts, meat, or plants' chemical composition
varies batch to batch. contains at least one ingredient that is not chemically defined
-nutrient broth
-nutrient agar (beef extract)
Reducing Media used for the cultivation of anaerobic bacteria
-contains chemicals that combine O2 to deplete it
Capnophiles microbest that require high CO2 conditions
Answers
Biofilms -microbial communities
-form slime or hydrogels that adhere to surfaces
-share nutrients
-shelter bacteria from harmful environmental factors
-resistant to microbicides
-involved in 70% of infections
Culture medium nutrients prepared for microbial growth (agar)
Sterile no living microbes
Inoculum introduction of microbes into a medium
Culture microbes growing in or on a culture medium
, Agar complex polysaccharide
used as a solidifying agent
-not metabolized by microbes
-liquifies at 100 celsius
-solidifies at 40 celsius
-has beef in it (nutrients)
Chemically defined media exact chemical composition is known and the amount
Complex media extracts and digests of yeasts, meat, or plants' chemical composition
varies batch to batch. contains at least one ingredient that is not chemically defined
-nutrient broth
-nutrient agar (beef extract)
Reducing Media used for the cultivation of anaerobic bacteria
-contains chemicals that combine O2 to deplete it
Capnophiles microbest that require high CO2 conditions
