Bacterial Metabolic REactions
Terms
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- exoenzymes
-
enzymes that work outside the bacteria.
e.g.,
Permeases break down polysaccharides into monosaccs so they can be taken up by the bug. - endoenzymes
- enzymes necessary for intracellular proceses like metabolizing nutrients.
- Constitutive vs. Adaptive Enzymes
-
Constitutive are always present;
Adaptive normally low concentration; produced at higher levels in presence of substrate. - 3 reasons bacteria need carbs:
-
-cell wall
-glycocalyx
-nucleic acids - anabolism of carbs in bugs is called
- gluconeogenesis
- what do bacteria need lipids for?
-
-cell wall
-cell membrane
-endotoxins - in gram negatives! LPS - why do bacteria do purine and pyrimidine biosynthesis?
- they break down enzymes to make new ones.
- what do bacteria require proteins/amino acids for?
-
-enzymes
-cell wall
-cell membrane
-exotoxins
-appendages - what is necessary for protein catabolism?
- peptones
- what organism is used for Q.C. on autoclaving?
- bacillus stearothermophilus