Question

scenario 6: the science fair enzyme experiment
a student is conducting a science fair project to investigate how different environmental factors affect the rate of an enzyme - catalyzed reaction. the student chooses to study amylase, a common enzyme found in human saliva that breaks down starch into simple sugars. the student sets up a series of experiments, measuring the rate at which amylase breaks down starch under varying conditions of temperature, ph, and substrate concentration.
the students data is compiled in the following graphs.
based on the provided graph of temperature - activity, what is the optimal temperature for amylase to function, and what happens to the enzymes structure when the temperature rises significantly?
the optimal temperature is the peak of the curve, and the enzymes active site becomes more efficient
the optimal temperature is the highest point on the curve, and the enzyme begins to denature, losing its specific shape and function
the optimal temperature is 0°c, and the enzymes structure becomes more rigid
the optimal temperature is the lowest point on the curve, and the enzymes activity increases indefinitely

Explanation:

Enzymes have an optimal temperature for maximum activity, which is the peak of the activity - temperature curve. When the temperature rises significantly above the optimal temperature, enzymes denature. Denaturation causes the enzyme to lose its specific 3 - D shape (including the active site shape), and thus it loses its function.

Answer:

The optimal temperature is the peak of the curve, and the enzyme begins to denature, losing its specific shape and function.