5. draw and label an inhibitor affecting an enzyme reaction.

6. what 2 environmental conditions can affect the activity of an enzyme?
__________ & __________

use the 2 graphs below to answer questions 10 & 11.
graphs: temperature vs enzyme activity, ph vs enzyme activity

7. what is the optimal ph that this enzyme functions at? __________

8. what is the optimal temperature that this enzyme functions at? ________

9. what happens when the ph is 2? __________

use the below graph to answer questions 10-12
graph: ph vs relative rate of activity for gastric protease and intestinal protease

10. what is the optimal ph for intestinal protease? ______

11. what is the optimal ph for gastric protease? ______

12. which enzyme works best in a very acidic environment? (circle your answer) gastric protease
intestinal protease

true or false:
13. enzymes are alive.
14. enzymes are found in all living things.
15. denatured enzymes do not work.
16. a small change in temperature will denature an enzyme.
17. all enzymes in the human body work at the same ph level.
18. in the induced fit model of an enzyme the active site will wrap around the substrate.
19. enzymes are catalysts.
20. all proteins are enzymes.

Question

5. draw and label an inhibitor affecting an enzyme reaction.

6. what 2 environmental conditions can affect the activity of an enzyme?
__________ & __________

use the 2 graphs below to answer questions 10 & 11.
graphs: temperature vs enzyme activity, ph vs enzyme activity

7. what is the optimal ph that this enzyme functions at? __________

8. what is the optimal temperature that this enzyme functions at? ________

9. what happens when the ph is 2? __________

use the below graph to answer questions 10-12
graph: ph vs relative rate of activity for gastric protease and intestinal protease

10. what is the optimal ph for intestinal protease? ______

11. what is the optimal ph for gastric protease? ______

12. which enzyme works best in a very acidic environment? (circle your answer) gastric protease
intestinal protease

true or false:
13. enzymes are alive.
14. enzymes are found in all living things.
15. denatured enzymes do not work.
16. a small change in temperature will denature an enzyme.
17. all enzymes in the human body work at the same ph level.
18. in the induced fit model of an enzyme the active site will wrap around the substrate.
19. enzymes are catalysts.
20. all proteins are enzymes.

Accepted Answer

### Question 6
# Brief Explanations:
Enzyme activity is affected by environmental factors. Temperature affects the kinetic energy of enzyme and substrate molecules, and pH affects the enzyme's active site structure. Two common environmental conditions are temperature and pH (other valid ones could be substrate concentration, inhibitor presence, but temperature and pH are fundamental and common for this question).
# Answer:
Temperature & pH (or other valid pairs like "Substrate Concentration & Inhibitor Concentration", but Temperature and pH are most typical for this basic enzyme question)

### Question 7
# Brief Explanations:
The optimal pH of an enzyme is where its activity is highest, seen at the peak of the pH - enzyme activity graph. From the second graph (pH vs Relative Rate of Enzyme Action), the peak is at pH 8.
# Answer:
8

### Question 8
# Brief Explanations:
Optimal temperature is where enzyme activity is maximum, at the peak of the temperature - enzyme activity graph. The first graph (temperature vs Relative Rate of Enzyme Action) has a peak at 40°C.
# Answer:
40°C (or 40 degrees Celsius)

### Question 9
# Brief Explanations:
From the pH - enzyme activity graph, at pH 2, the relative rate of enzyme action is 0 (the graph starts at non - zero, but at pH 2, it's at the origin? Wait, looking at the second graph: the x - axis is pH, y - axis is relative rate. At pH 2, the rate is 0. So the enzyme has no activity (or is denatured at this pH, so it can't catalyze the reaction).
# Answer:
The enzyme has no activity (or the enzyme is denatured, so the reaction rate is 0)

### Question 10
# Brief Explanations:
For Intestinal Protease (the solid line in the third graph), the optimal pH is at the peak of its curve. The peak occurs at pH 8.
# Answer:
8

### Question 11
# Brief Explanations:
For Gastric Protease (dashed line in the third graph), the peak of its curve (optimal pH) is at pH 2.
# Answer:
2

### Question 12
# Brief Explanations:
A very acidic environment has a low pH (close to 0 - 4). Gastric Protease has its optimal pH at 2 (acidic), while Intestinal Protease has optimal pH at 8 (alkaline). So Gastric Protease works best in a very acidic environment.
# Answer:
Gastric Protease (to circle: Gastric Protease)

### Question 13
# Brief Explanations:
Enzymes are proteins (or RNA in some cases) that act as catalysts. They are not alive as they do not have the characteristics of living things (like growth, reproduction, independent metabolism). So the answer is False.
# Answer:
False

### Question 14
# Brief Explanations:
All living things carry out metabolic reactions, and enzymes are required to catalyze these reactions. So enzymes are found in all living things. Answer is True.
# Answer:
True

### Question 15
# Brief Explanations:
Denaturation changes the active site of the enzyme, making it lose its specific three - dimensional structure. Without a proper active site, the enzyme can't bind to the substrate effectively, so it does not work. Answer is True.
# Answer:
True

### Question 16
# Brief Explanations:
A small change in temperature (within the normal range, not extreme) usually affects the rate of reaction by changing molecular motion, but does not denature the enzyme. Denaturation occurs at extreme temperatures (like very high or very low, but usually high for most enzymes). So a small change won't denature it. Answer is False.
# Answer:
False

### Question 17
# Brief Explanations:
Different enzymes in the human body work at different pH levels. For example, gastric protease works at acidic pH (around 2), while intestinal protease works at alkaline pH (around 8). So not all enzymes work at the same pH level. Answer is False.
# Answer:
False

### Question 18
# Brief Explanations:
In the induced - fit model, the active site of the enzyme is not a rigid structure. When the substrate binds, the active site undergoes a conformational change to better fit the substrate (wraps around it). So this statement is True.
# Answer:
True

### Question 19
# Brief Explanations:
Enzymes are biological catalysts. They speed up chemical reactions in cells without being consumed in the process. So the statement is True.
# Answer:
True

### Question 20
# Brief Explanations:
While all enzymes are proteins (or RNA), not all proteins are enzymes. For example, structural proteins like collagen are not enzymes. So the statement is False.
# Answer:
False

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