LAB 5 environmental stress response Flashcards
ideal temp for psychrophiles
-5-15 C
ideal temp for mesophiles
10-45 C
ideal temp for thermophiles
40-70C
ideal temp for extreme thermophiles
65-110 C
what are some adaptation bacteria have to cold envoirments
reduction of primary metabolisum
peptidoglycan thicking
increase in short chain or fatty acids
increase in enymes w high catalytic activity
bacterial adaptation in hot envoirments
folding of porteins to more heat tolerant forms
are high in saturatrd fatty acids which allows for a more stable mebrane
special DNA binding proteins arrange the DNA
into globular particles which are increasingly resistant to melting
what range of light is considered to be UV
100 to 400 nm
what is the main effect of UV on a cell
absorption of UV by DNA causing mutations
production of free radicals that destabilize macromolecules
what does penicillin G target and what does it effect in its target
Gram positives and cell wall synthesis
what does Vancomycin target and what does it effect in its target
gram positives and 30S ribosomal subunit
what does Novoniocin target and what does it effect in its target
Broad spectrum- targets DNA gyrase
how may a bacteria become ristant to antibiotics
lack of target structure
inactivation of the antibiotic
alteration of the antibiotic target
development of resistance pathway
