module 2 - 2.1.4 statistics and experiments - enzymes Flashcards
1
Q
how do you calculate the gradient?
A
create a tangent
- change in y / change in x
2
Q
what are the main types of reaction?
A
- gas production
- digestion of a solid
- digestion of a liquid
- colour change
3
Q
how do you carry out a gas production experiment?
A
- count bubble formation
- gas syringe
- displacement of syringe cap with increasing volume of gas
4
Q
how do you carry out a digestion of a solid experiment?
A
- calculate percentage weight change
- change in diameter
- volume of liquid produced
5
Q
how do you carry out a liquid digestion experiment?
A
diffusion out of a dialysis tube
6
Q
how do you carry out a colour change experiment?
A
- starch reacts with iodine
- peptide bonds are stained via the biuret test
- reducing vs. non-reducing sugars
7
Q
what is a 10 fold serial dilution?
A
reducing the concentration of a solution by a factor of 10 (1/10 of original conc.)
8
Q
what is a 2 fold serial dilution?
A
reducing the concentration of a solution by a factor of 2 (1/2 of original conc.)
9
Q
what is standard deviation?
A
measure of how spread data is from a mean
10
Q
how are standard deviations measured on graphs?
A
- error bars
- vertical line, before and after plotted point
