PRACTICAL: Measuring how fast a substrate disappears

Question 1

1 - what does the enzyme amylase catalyse the breakdown of?

Answer 1

starch and maltose

Question 2

2 - how do you detect starch?

Answer 2

using iodine solution

Question 3

2 - what colour does the iodine solution go if starch is present?

Answer 3

browny-orange to blue-black

Question 4

3 - when do you record the iodine solution?

Answer 4

when there is no longer starch present - when the iodine solution remains browny-orange

Question 5

4 - how do you repeat the experiment?

Answer 5

with the water bath at different temperatures to see how it affects the time taken for starch to be broken down