Question

1. an incomplete graph is shown below. what two internal body conditions could appropriately be used to replace letter z on the axis? effect of z on enzyme activity enzyme activity z 14. what kind of organic molecule is an enzyme? 15. list 2 internal environmental factors that affect how well enzymes function. 16. what happens to water when you heat it to 100°c? 17. what happens to proteins dissolved in that water when you heat it to 100°c? 18. what specific change happens to an enzyme that stops it from working when you heat it? 19. explain why changing the shape of an enzyme could affect the ability of the enzyme to function.

Explanation:

Step1: Recall factors affecting enzyme activity

Temperature and pH are two major internal body - conditions that affect enzyme activity.

Step2: Answer question 13

Temperature and pH can be used to replace letter Z on the axis as they have a characteristic bell - shaped curve effect on enzyme activity.

Step3: Recall the nature of enzymes

Enzymes are proteins.

Step4: Answer question 14

Protein

Step5: Recall internal environmental factors for enzymes

Temperature and pH are internal environmental factors that affect enzyme function.

Step6: Answer question 15

Temperature, pH

Step7: Recall the property of water at 100°C

Water boils at 100°C under standard atmospheric pressure.

Step8: Answer question 16

It boils.

Step9: Recall the effect of high temperature on proteins

Proteins denature when heated to high temperatures like 100°C.

Step10: Answer question 17

They denature.

Step11: Recall the effect of heat on enzymes

Enzymes denature when heated. Denaturation involves the disruption of the enzyme's 3 - D structure.

Step12: Answer question 18

It denatures (its 3 - D structure is disrupted).

Step13: Recall the lock - and - key model of enzyme action

Enzymes have a specific 3 - D shape that is complementary to their substrate. A change in shape can prevent the substrate from binding.

Step14: Answer question 19

Enzymes work based on the lock - and - key model. A change in shape can prevent the substrate from binding to the active site, thus affecting the enzyme's function.

Answer:

1. Temperature, pH
2. Protein
3. Temperature, pH
4. It boils.
5. They denature.
6. It denatures (its 3 - D structure is disrupted).
7. Enzymes work based on the lock - and - key model. A change in shape can prevent the substrate from binding to the active site, thus affecting the enzyme's function.