Enviromental infulances

Question 1

what is quorum sensing

Answer 1

process where bacterial cells work together at high density
- it was discovered in aliivibrio fisheri (squid)

Question 2

what does luciferase do?

Answer 2

Luciferase is a generic term for the class of oxidative enzymes that produce bioluminescence,

Question 3

as the population of photosynthetic bacteria becomes denser, what molecule accumulates and stops the production of luciferase using a feedback loop?

Answer 3

homoserine lactone

Question 4

example of quorum-sensing bacteria

Answer 4

pseudomonas aeruginosa

Question 5

thermus aquaticus is the basis for

Answer 5

heat stable dna polymerase

Question 6

bacteria maintain a relatively constant internal ph despite of

Answer 6

external ph

Question 7

what are alkaliphiles

Answer 7

refers to microorganisms that grow well at pH values exceeding pH 9

Question 8

what do alkaliphiles use instead of protons to turn their flagella

Answer 8

Na

Question 9

in neutrophils is oxygen beneficial

Answer 9

si

Question 10

what reactions destroy reactive oxygen species

Answer 10

catalase and peroxidase

Question 11

where is catalase in the organelle

Answer 11

peroxisome, also responsible for acid metabolism.

Question 12

what happens during programmed cell death in response to starvation. (No stress)

Answer 12

antitoxin neutralized toxin activity. cell lives

Question 13

what happens during programmed cell death in response to starvation. (starvation)

Answer 13

2. cell dies, releases nutrients
3. cleavage of G6PD