growth and genetics

Question 1

what are the 4 phases associated with growth of bacteria as presented on a growth curve ?

Answer 1

lag phase
groowth phase
stationary phas
death phase

Question 2

in which phase of the bacterial growth phase do antibiotics have their greatest effect ?

Answer 2

the growth phase

Question 3

what are the thee mechanisms of gene transfer between bacteria ?

Answer 3

transformation
conjugation
transduction

Question 4

which method of gene transfer associated with the easiest uptake of DNA ?

Answer 4

transformation

Question 5

how does conjugation happen ?

Answer 5

onn bacteria transforms DNA to another usin sx pillu
this happns throouh plasmid exchane

Question 6

what is the main method of transfer of antibiotic resistance in bacteria ?

Answer 6

horizontal gene transfer

Question 7

what is transduction and what are thee two types ?

Answer 7

is the transfer of DNA through a bacteriophage
two types are localized very specific piece of DNA is taken
and generalized random selection

Question 8

what are the 2 methods in which transduction happens ?

Answer 8

lytic cycle
lysogenic cycle

Question 9

what is the difference between phages that replicate in the lytic cycle and phages that replicate in both ?

Answer 9

phages that replicate only in lytic phase are called virulent
phages that replicate in both are called temperate

Question 10

what is transposition ?

Answer 10

using transposons , its the. ability for genes to jump from one strand to the other or from one genome to the other

Question 11

which bacterial toxins are encoded in a lysogenic phase ?

Answer 11

ABCDS
group A strep erythrogenic
botulinum toxin
cholera toxin
diphtheria toxin
shiga toxin

Question 12

which bacteria are more associated with genetic. transformation ?

Answer 12

step pneumonia
H influenza
Neisseria