required practical 6

Question 1

independant varriable

Answer 1

type of antibiotic

Question 2

dependant varriable

Answer 2

zone of inhibition

Question 3

control varriable

Answer 3

type of agar plate
temperature they are kept in
strain of e.coli being tested

Question 4

how to control control varriables

Answer 4

keep in thermostatically controlled environment

Question 5

error

Answer 5

not storing agar plate up side down so condensation contaminates it

Question 6

effect of control varriables on dependant varriables

Answer 6

antibiotics will kill different bacteria differently so results wont be comparible and high temperature will cause antibiotics to make quicker

Question 7

limitations

Answer 7

no repeats
didnt measure the area of the zone of inhibition only the diameter

Question 8

improvements

Answer 8

do repeats
find area
use many types of bacteria

Question 9

what IS RP6

Answer 9

use of aseptic techniques to investiagte effects of antibiotics on microbial growth