Enzymes

The diagram shown is of the lock and Key concept of enzyme action that occurs in humans. Which letter represents an enzyme?

• A

• B

• C

• D

Which letter represents an enzyme -substrate complex?

• A

• B

• C

• E

The diagram shown represents a enzyme-catalyzed reaction. The chemical process represented by this reaction is

• replication

• synthesis

• digestion

• cellular respiration

Maltase is an enzyme that synthesizes a sugar called maltose. It is not able to catalyze synthesis of lipids because maltase

• has a specific active site

• is a small molecule

• cannot attach to ribosomes

• is a simple sugar

What occurs during digestion of proteins?

• Specific enzymes break down proteins into amino acids.

• Specific hormones break down protein into simple sugar.

• Specific Hormones break down proteins into complex starches.

• Specific enzymes break down proteins into simple sugars.

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

• The dipeptide would digest faster.

• The dipeptide would digest slower or not at all.

• The amino acids would combine faster.

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

Tags

NGSS.HS-LS1-3

Base your answer to the following question on the graph above and on your knowledge of biology. 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

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

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

• A and B

• C and D

• B and C

• B and D

Which characteristic allows enzymes to function in a specific way?

• Enzymes are complex compounds composed of starch.

• Each enzyme has a characteristic shape.

• Enzymes are long, complex fats.

• Each enzyme is made up of four subunits.