Biology unit 6 practice test

What is the optimum temperature for the action of this enzyme?

50 degrees celcius

Enzymes have an optimum temperature at which they work best. Temperatures above and below the optimum will decrease enzyme activity. which graph illustrates the effect of temperature on enzyme activity?

B

Meat tenderizer contains an enzyme that interacts with meat. If meat is coated with tenderizer and then placed in a refrigerator for a short time, how would the enzyme be affected?

Its activity would slow down

What statement best describes the enzyme represented in the graphs?

This enzyme works best at a temperature of 35 degrees celcius and a pH of 8

The molecule luciferin is broken down, and energy is released in the form of heat and light. In this process, luciferase functions as

an enzyme

The substance labeled catalyst is also known as

an enzyme

At what pH would the enzyme be most effective?

between 8 and 10

Plants such as the Venus flytrap produce chemical compounds that break down insects into substances that are usable by the plant. The chemical compounds that break down the insects are most likely

biological catalysts

The most likely result of mixing both enzymes with their substrates in a single test tube is that

both enzymes would exhibit some activity at pH 5

Which characteristic allows enzymes to function in a specific way?

each enzyme has a characteristic shape

Which enzyme shows the greatest change in its rate of action with the least change in pH?

enzyme D

The X in each reaction represents various

enzymes

Which two enzymes would function in a region of the human body having a neutral pH?

enzymes B and C

What is a true statement about the relationship between pH and enzyme action?

enzymes function only in a pH range of 4.0 to 5.5

If a base is gradually added to this solution, the rate of action of enzyme C would most likely

increase, then decrease

A colony of bacteria growing on a culture medium is successfully an organic compound. What procedure would be least likely to have an effect on this synthesis?

increasing the number of hormone molecules in the colony

which procedure would have the least effect on the rate of protein digestion?

procedure A

All chemical breakdown processes in cells directly involve

reactions that are controlled by catalysts

When the substrate concentration increases from 0.4% to 0.5%, the rate of the reaction

remains the same

What would happen if a temperature change caused the shape of the active site to be altered?

the deptide would digest slower or not at all