required practical 9 Flashcards
1
Q
independant varriable
A
temperature of the water bath
2
Q
dependant varriable
A
time taken for methylene to change colour
3
Q
control varriable
A
time in water bath
volume of methylene
yeast and glucose volume
4
Q
how to control the control varriables
A
use a timer and syringe
5
Q
effect of the control varriables on dependant varriables
A
too long in the water bath could increase enzyme activity so too many eszyme substate complexes form increasing rate of reaction
6
Q
error
A
not pressing start on the timer quick enough
7
Q
limitations
A
temperature of the water bath is inaccurate
8
Q
improvements
A
use thermostatically controlled waterbath
use a pH buffer
repeat and find the mean
9
Q
what is RP9
A
temperatures effect on respiration rate
