Enzymes - PD 2

Compound X increases the rate of the reaction above.

Compound X is most likely

• an enzyme

• a lipid molecule

• an indicator

• an ADP molecule

The effect of temperature on the relative rate of action of an enzyme is represented in the graph.

The optimum temperature for the action of this enzyme is approximately

• 15°C

• 22°C

• 37°C

• 50°C

Tags

NGSS.HS-PS1-5

Which statement best describes the enzyme represented in the graphs?

• This enzyme works best at a temperature of 50°C and a pH of 12.

• Temperature and pH have no effect on the action of this enzyme.

• This enzyme works best at a temperature above 50°C and a pH above 12.

• This enzyme works best at a temperature of 35°C and a pH of 8.

A process that occurs in the human body is shown in the diagram. What would happen if a temperature change caused the shape of the active site to be altered?

• The substrate would digest faster.

• The substrate would digest slower or not at all.

• The amino acids would combine faster.

• The amino acids would combine slower or not at all.

The graph shows the relative rates of action of four enzymes, A, B, C, and D. Which enzyme shows the greatest change in its rate of action with the least change in pH?

• A

• B

• C

• D

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

• fats

• minerals

• biological catalysts

• complex carbohydrates

Tags

NGSS.MS-LS1-7

The effect of pH on a certain enzyme is shown in the graph.

• above 10

• between 8 and 10

• between 3 and 5

• below 5

The diagram illustrates a biochemical process that occurs in organisms. The substance labeled “catalyst” is also known as

• a hormone

• an enzyme

• an antibody

• an inorganic compound

Which characteristic allows enzymes to function in a specific way?

• Enzymes are complex compounds composed of starch.

• Enzymes are long, complex fats.

• Each enzyme has a characteristic shape.

• Each enzyme is made up of four subunits.

Base your answer on the graph and on your knowledge of biology. Which is a true statement about the relationship between pH and enzyme action?

• All enzymes work best at a neutral pH.

• Adding more acid does not affect the rate of activity of an enzyme.

• Enzymes function only in a pH range of 4.0 to 5.5.

• The activity of an enzyme is affected by pH.