required practical 1

Question 1

independant variable

Answer 1

temperature of the water bath ( 20,40,60)

Question 2

dependant variable

Answer 2

time taken for the X to become visible

Question 3

control variable

Answer 3

milk being at 37 degrees
volume of milk and its pH
temperature of the solution

Question 4

how are the control varriables controlled

Answer 4

using at 7pH buffer
syringe to make 3% milk concentrartion and 0.5% trypsin
syringe to measure 2 cm3 of trypsin and 10 cm3 of powdered milk solution

Question 5

errors that could occur

Answer 5

not starting the timer quick enough
not resting the timer

Question 6

limitations

Answer 6

water bath isnt thermostatically controlled so it isnt reliable
not using a pH buffer

Question 7

improvements

Answer 7

use thermostatically controlled water bath
use a pH buffer

Question 8

what is RP1

Answer 8

rate of enzyme controlled reactions for the cloudy solution to become colourless