required practical 8

Question 1

independant varriable

Answer 1

type of light solution is exposed to

Question 2

dependant varriable

Answer 2

colour of the suspension after light exposure

Question 3

control varriable

Answer 3

distance from lamp
volume of chloroplast , DCPIP, isolation medium

Question 4

how are controlled varriables controlled

Answer 4

using a ruler , timer and a syringe

Question 5

how do controlled varriables effect dependant varriable

Answer 5

colour would be different due to too much light exposure because more light dependant reaction would take place

Question 6

error

Answer 6

not starting the timer
not making correct measurements

Question 7

limitations

Answer 7

pestal and mortor might not crush the leaf enough
too close to the lamp could cause temperature to effect results

Question 8

improvements

Answer 8

repeat and find the mean
work with the lights off so solutions arent exposed to light before the timer starts

Question 9

what is RP8

Answer 9

effect of light on the rate of dehydrogenase enzymes in chloroplasts