Outside the
box
starch is digested by the enzyme amylase.
a student did an investigation on amylase activity.
this is the method used.
1. mix amylase solution and starch suspension at 20 °c in a boiling tube.
2. remove a drop of the mixture every 30 seconds and test it for starch.
3. continue testing every 30 seconds until no starch is detected.
4. repeat the investigation at different temperatures.
1
what apparatus should the student use to control the temperature of the mixture?
[1 mark]

The student should use an incubator to control the temperature of the mixture.

INCUBATOR:

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An incubator.

Explanation:

Most enzymes work best at about 37 °C and start to denature around 40 °C.

Thus, the student should use a laboratory incubator, which is essentially an oven that can heat a biological sample to a set temperature.

This model shown below reaches a maximum temperature of 62° C, and its heat controller maintains temperatures within ± 0.5 °C°.

one centimetre is equal to 0.01 metres

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