8. study the graph below. it illustrates the effect of ph on the rate of enzyme action.
(a) how does ph affect this enzyme’s activity?
(b) what type of solution is best for this enzyme to function?
(c) what would happen to the enzyme if the ph was held at 9?
9. study the graph below. it illustrates the effect of temperature upon rate of enzyme action.
effect of temperature on enzyme action
(a) how does temperature affect this enzyme’s activity?
(b) what is the best temperature for this enzyme to function?
(c) what would happen to the enzyme if the temperature exceeded 60°c?

Question

Accepted Answer

### Question 8 (Effect of pH on Enzyme Action)
#### (a) How does pH affect this enzyme’s activity?
# Brief Explanations:
Enzyme activity has an optimal pH range. Outside this range (too acidic or too alkaline), activity decreases. From the graph, the enzyme’s activity increases to an optimal pH, then decreases as pH moves away from that optimal point.
# Answer:
The enzyme’s activity increases to an optimal pH (where it’s highest) and then decreases as pH deviates (becomes more acidic or alkaline) from that optimal pH.

#### (b) What type of solution is best for this enzyme to function?
# Brief Explanations:
The best solution (in terms of pH) is the one with the pH at which enzyme activity is maximum (optimal pH). From the graph, identify the pH with the highest rate of enzyme activity—this pH’s solution (acidic, neutral, or alkaline) is best. Assuming the peak is around a specific pH (e.g., if the graph peaks at a slightly acidic or neutral/alkaline pH), the solution with that pH is optimal.
# Answer:
The solution with the pH at which the enzyme’s activity is maximum (its optimal pH) is best. For example, if the graph peaks at pH 5 - 6, an acidic (or near - neutral) solution at that pH is best.

#### (c) What would happen to the enzyme if the pH was held at 9?
# Brief Explanations:
pH 9 is likely outside the enzyme’s optimal range (if the graph shows activity dropping at pH 9). Enzymes are sensitive to pH; at non - optimal pH (like 9, if it’s too alkaline), the enzyme’s active site may denature or change shape, reducing its activity or causing it to stop functioning effectively.
# Answer:
The enzyme’s activity would likely decrease significantly (or stop) because pH 9 is outside its optimal pH range, potentially causing the enzyme to denature (change its active site structure) and lose its catalytic ability.

### Question 9 (Effect of Temperature on Enzyme Action)
#### (a) How does temperature affect this enzyme’s activity?
# Brief Explanations:
Enzyme activity has a temperature - dependent pattern. Up to an optimal temperature, activity increases (as molecules move faster, more collisions between enzyme and substrate). Beyond the optimal temperature, activity decreases (due to denaturation of the enzyme’s active site). From the graph, temperature increase up to a point boosts activity, then further increase (beyond optimal) reduces it.
# Answer:
As temperature increases from a low value to the optimal temperature, the enzyme’s activity increases (reaching a maximum at optimal temp). When temperature exceeds the optimal temperature, the enzyme’s activity decreases (due to denaturation).

#### (b) What is the best temperature for this enzyme to function?
# Brief Explanations:
The best (optimal) temperature is where the enzyme’s activity is highest (the peak of the graph). From the temperature - enzyme activity graph, identify the temperature at which the rate of enzyme activity is maximum. For example, if the graph peaks around 30 - 40°C, that range is the optimal temperature.
# Answer:
The temperature at which the rate of enzyme activity is maximum (the peak of the temperature - enzyme activity graph) is the best temperature for the enzyme to function. For example, if the graph peaks at 35°C, 35°C is the best temperature.

#### (c) What would happen to the enzyme if the temperature exceeded 60°C?
# Brief Explanations:
Temperatures above 60°C are typically high for most enzymes. High temperatures cause enzymes to denature (their protein structure, including the active site, breaks down). When denatured, the enzyme loses its specific 3D structure, including the active site, so it can no longer effectively bind to the substrate and catalyze reactions.
# Answer:
The enzyme would likely denature (its active site structure would be destroyed) because temperatures above 60°C are too high, causing the enzyme to lose its catalytic activity and ability to function.

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QUESTION IMAGE

Question

Explanation:

Question 8 (Effect of pH on Enzyme Action)

(a) How does pH affect this enzyme’s activity?

Answer:

(b) What type of solution is best for this enzyme to function?