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]

Question

Edith

Biology

23 May, 22:30

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]

+2

Answers (1)

Know the Answer?

Petty · Answer 1

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°.