The graph above shows the temperature profile for T.aquaticus polymerase,an enzyme used by a species of bacteria that lives in hot springs.What does the boxed region indicate?
A)The enzyme activity increases as substrates increase their kinetic energy.
B)The enzyme activity decreases as substrates increase their kinetic energy.
C)The enzyme activity increases as the enzyme denatures.
D)The enzyme activity decreases as the enzyme denatures.
E)The enzyme activity decreases as the enzyme refolds.

Question

The graph above shows the temperature profile for T.aquaticus polymerase,an enzyme used by a species of bacteria that lives in hot springs.What does the boxed region indicate?
A)The enzyme activity increases as substrates increase their kinetic energy. 
B)The enzyme activity decreases as substrates increase their kinetic energy. 
C)The enzyme activity increases as the enzyme denatures. 
D)The enzyme activity decreases as the enzyme denatures. 
E)The enzyme activity decreases as the enzyme refolds.

Quizplus · Accepted Answer

The boxed region shows the temperature range where the enzyme activity decreases as the enzyme denatures. Above this temperature range (to the right of the graph), the enzyme is completely denatured and inactive. The temperature profile graph shows that T.aquaticus polymerase has an optimal temperature range for enzyme activity (around 82-85 degrees Celsius), and outside of this range the enzyme begins to denature and lose activity.

The Graph Above Shows the Temperature Profile for T