SB1 E

Compound X increases the rate of the reaction on the side. Compound X is most likely

• an enzyme

• a lipid molecule

• an indicator

• an ADP molecule

Tags

NGSS.HS-PS1-5

Base your answer on the graph and on your knowledge of biology. The most likely result of mixing both enzymes with their substrates in a single test tube is that

• only gastric protease would be active if the pH of the mixture was basic

• gastric protease would be more active that intestinal protease at pH 6

• both enzymes would exhibit some activity at pH 5.

• intestinal protease would be more active than gastric protease at pH 4. C

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.

The equation below summarizes the process that produces the flashing light of a firefly.

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

• A. a reactant

• product

• an enzyme

• a starch

Base your answer on the reactions shown in the graphic. The X in each reaction represents various

• energy sources

• final products

• reactants

• enzymes

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

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

• 50°C

• 37°C

Which statement best describes the enzyme represented in the graphs?

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

• 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.

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 dipeptide would digest faster.

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

• The amino acids would combine faster.

• The dipeptide would digest slower or not at all.

Tags

NGSS.HS-PS1-5

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?

• Enzymes A

• Enzymes B

• Enzymes C

• Enzymes D

The graph shows the relative rates of action of four enzymes, A, B, C, and D. A solution with a pH of 6 contains enzyme C and its substrate. If a base is gradually added to this solution, the rate of action of enzyme C would most likely

• remain constant

• increase, then decrease

• decrease, then increase

• decrease constantly