2.1 - 2015 June Q4 Answers
A student carries out an investigation to determine the effect of temperature on the action of salivary amylase on starch.
This is the student’s method.
Suggest how the student could improve his investigation. (4)
This is the student’s method.
- pour some starch solution into a test tube
- add some salivary amylase to the starch solution
- add iodine to the amylase/starch solution
- place the amylase/starch solution into a water bath set at 40°C
- use a stopwatch to time how long it takes for the colour to change
Suggest how the student could improve his investigation. (4)
Answers
