Scottish Highers Human Biology Problem Solving: Saliva contains the enzyme amyla

Question

Saliva contains the enzyme amylase, which breaks down starch into maltose.

The presence of starch can be tested for by adding iodine solution, which turns blue/black if starch is present.

In an investigation, four test tubes were set up in a water bath at 37 °C. Each test tube contained 10 cm³ of starch solution and 2 cm³ of amylase. 2 cm³ of buffer solutions of different pH values were added to each test tube.

A sample of the contents of each test tube was removed every 30 seconds for 10 minutes and tested with iodine.

Identify the independent variable in this investigation.

Saliva contains the enzyme amylase, which breaks down starch into maltose - Scottish Highers Human Biology - Question 8 - 2022

Worked Solution & Example Answer:Saliva contains the enzyme amylase, which breaks down starch into maltose - Scottish Highers Human Biology - Question 8 - 2022

Identify the independent variable in this investigation.

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