What is the optimal temperature for the enzyme in this graph?

37.5 oC
There is a certain temperature at which an enzyme’s catalytic activity is at its greatest (see graph). This optimal temperature is usually around human body temperature (37.5 oC) for the enzymes in human cells.

What are the optimal temperatures of the bacterial enzymes?

Enzymes synthesized by hyperthermophiles (bacteria and archaea with optimal growth temperatures of >80°C), also called hyperthermophilic enzymes, are typically thermostable (i.e., resistant to irreversible inactivation at high temperatures) and are optimally active at high temperatures.

What temperature do restriction enzymes work best at?

37°C.
The optimum temperature for the activity of most restriction enzymes is 37°C. Some enzymes, however, work best at 55°C, 65°C, or even 75°C! That’s because these enzymes are derived from extremophiles, microorganisms that live at very high temperatures under extreme conditions.

Which is the best temperature for enzymes to work?

The optimum temperature for most enzymes is about 98.6 degrees Fahrenheit (37 degrees Celsius). There are also enzymes that work well at lower and higher temperatures. For example, Arctic animals have enzymes adapted to lower optimal temperatures; animals in desert climates have enzymes adapted to higher temperatures.

How does temperature affect the reaction rate of lactase?

This happens because after the lactase enzyme is heated up to a certain temperature the enzyme starts to denature. This lab helped us determine the effect of temperature on the reaction rate of enzyme reactions.

How is the range of enzyme activity determined?

However, enzymes are still proteins, and like all proteins, they begin to break down at temperatures above 104 degrees Fahrenheit. Therefore, the range of enzyme activity is determined by the temperature at which the enzyme begins to activate and the temperature at which the protein begins to decompose.

What is the maximum reaction rate of an enzyme?

Furthermore, even though an enzyme may appear to have a maximum reaction rate between 40°C and 50°C, most biochemical reactions are carried out at lower temperatures because enzymes are not stable at these higher temperatures and will denature after a few minutes. Figure 18.7. 2: Temperature and pH versus Concentration.