1Vocab

Question 1

post-exponential phase

Answer 1

detect a quorum and create exotoxins

Question 1

flagellae

Answer 1

motor & whip for motility; never on G+ cocci

Question 2

lag phase

Answer 2

enzymes being induced to allow growth

Question 3

aerotolerant anaerobe

Answer 3

can grow in presence or absence of O2, but only ferment (no SOD or catalase)

Question 4

protoplast

Answer 4

G+ bacteria without its cell wall

Question 5

spheroplast

Answer 5

G- bacteria without is cell wall

Question 6

log phase

Answer 6

exponential growth; 20 min to 2 days

Question 7

obligate anaerobes

Answer 7

need absence of O2, fement (no SOD or catalase)

Question 9

obligate aerobes

Answer 9

need O2, oxidative metabolism, have superoxide dimutase and catalase

Question 10

minimum bactericidal concentration

Answer 10

minimum conc. of antibiotic that reduces bacteria by 3 fold

Question 10

exotoxin

Answer 10

secreted protein

Question 11

facultative anaerobe/aerobe

Answer 11

can grow in presence or absence of O2, have superoxide dimutase and catalase

Question 13

endotoxin

Answer 13

LPS or LOS; part of G- cell wall

Question 14

microaerophiles

Answer 14

aerobes that prefer reduced O2 levels

Question 16

siderophores

Answer 16

iron scavengers

Question 16

minimum inhibitory concentration

Answer 16

minimum conc. of antibiotic to stop growth

Question 17

fimbriae

Answer 17

fuzz layer on cells for adhesion

Question 18

mesophiles

Answer 18

can survive at body temp (37-42)

Question 19

stationary phase

Answer 19

nutrients used up, growth stops

Question 20

death phase

Answer 20

obligate fermenters die quickly in culture, oxidative live longer

Question 21

dermatophytes

Answer 21

cannot grow at 37, so confined to skin