Question

1. enzyme activity: below is a graph that shows the action of an enzyme called amylase at various temperatures. answer the questions about the graph.

a. what is the optimal temperature for the enzyme amylase?
b. what is the approximate activity % of amylase at 40c?
c. what happens to the activity of amylase as the temperature rises above 75c? explain why this happens.

Explanation:

Step1: Identify the peak of the graph

The peak of the amylase - activity vs temperature graph gives the optimal temperature. Looking at the graph, the peak occurs around 60°C.

Step2: Locate 40°C on the x - axis

Find 40°C on the x - axis of the graph and then read the corresponding activity value on the y - axis. The activity at 40°C is approximately 70%.

Step3: Analyze the graph above 75°C

As the temperature rises above 75°C, the activity of amylase decreases. This is because high temperatures cause the enzyme (a protein) to denature. Denaturation changes the three - dimensional structure of the enzyme, making it less effective at catalyzing reactions.

Answer:

A. 60°C
B. 70%
C. The activity of amylase decreases. High temperatures cause the enzyme (a protein) to denature, changing its three - dimensional structure and reducing its catalytic ability.