N5 Biology Unit 1 Revision (KA 4-6)

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• KA 4 Enzymes
• KA 5 Genetic Engineering
• KA 6 Respiration

Which of the following are all types of proteins

• Hormones, enzymes and antigens
• Antibodies, enzymes and plasmids
• Hormones, receptors and antibodies
• Receptors, antibodies and antigens

The diagram below represents a degradation reaction involving an enzyme.

• A
• B
• C
• D

The active site of an enzyme is complementary to

• one type of substrate molecule
• all types of substrate molecule
• one type of product molecule
• all types of product molecule

Which of the graphs below shows the effect of increasing temperature on enzyme activity?

• A
• B
• C
• D

The following graph shows the results of an investigation into the effect of pH on the activity of 4 enzymes. Which one of these enzymes could be pepsin in the stomach?

• A
• B
• C
• D

The diagram below shows an investigation into the digestion of starch by amylase, using a model gut.

• A
• B
• C
• D

Eight visking tubing (model gut) bags, as shown below, were placed into water baths. Which two bags could be compared to investigate the effect of pH on the digestion of starch?

• 1 and 4
• 2 and 5
• 2 and 7
• 7 and 8

Which term refers to the process by which complex molecules are formed from simple molecules?