9-1 Enzymes required practical

Identify the enzyme that digests starch

• Protease

• Amylase

• Lipase

• Maltase

In an experiment to investigate the effect of pH on the activity of amylase what is the independent variable?

• pH

• Temperature

• Time taken for starch to be digested

• Concentration of enzyme

State the word the describes the best pH at which an enzyme works

Identify the variable that is recorded as the outcome / result of an investigation

• Independent

• Controlled

• Dependent

• Input

Which of the following should be controlled in an experiment to investigate the effect of pH on the digestion of starch?

• Concentration of starch solution

• pH

• Time taken for the starch to be digested

• Light intensity

State the solution used to test for the presence of starch

What colour does iodine soultion become if starch is present in a food sample?

• Lilac

• Cloudy

• Brick red

• Blue/Black

What happens to enzymes at extremes of pH?

Identify the variable in which factors need to be kept the same so the do not impact on the outcome of the investigation

• Independent

• Output

• Dependent

• Controlled

What is the optimum pH for amylase in the human body?

• pH3

• pH5

• pH7

• pH9