Living Environment Enzymes

enzyme amylase is found in saliva and assists with the break down of starch into glucose. Explain how this occurs without affecting the chemical makeup of the amylase.

• Amylase bonds to the starch to speed up the reaction and detaches itself when complete, without being affected.

• Amylase does not take place in the starch reaction, but raises the temperature of the saliva to speed up the reaction.

• Amylase changes starch into a vapor which increases the reaction rate, but is recreated by the glucose.

• Amylase transfers all of its energy to the the starch molecules to slow down the reaction, but does not take place in the reaction.

Tags

NGSS.HS-PS1-5

Which letter represents an enzyme-substrate complex?

• A

• B

• C

• E

• This enzyme works best at a pH of 8

• This enzyme works best at a pH of 50

• pH does not have any effect on an enzyme.

• This enzyme is inhibited by a pH of 8.

Which letter represents a product?

• A

• B and D

• C

• E

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What happens to the rate of an enzyme reaction when heated up?

• Increases

• Decreases

• Increase and then decreases

• decreases and then increases

Which row in the chart below contains correct information concerning synthesis?

• Row (1)

• Row (2)

• Row (3)

• Row (4)

Tags

NGSS.HS-LS1-6

The organic compounds that scientists use to cut, copy, and move segments of DNA are

• carbohydrates

• enzymes

• hormones

• starches

Which of the following best describes the role of enzymes in biological systems?

• They provide energy for reactions.

• They increase the rate of chemical reactions.

• They are consumed in the reactions they catalyze.

• They change the equilibrium of reactions.

Tags

NGSS.HS-LS2-3

What is the effect of pH on enzyme activity?

• Enzymes are not affected by pH.

• Enzymes work best at a specific pH range.

• Enzymes are more active at high pH levels.

• Enzymes are more active at low pH levels.

Which of the following is an example of an enzyme-catalyzed reaction?

• Photosynthesis in plants

• Digestion of proteins in the stomach

• Evaporation of water

• Formation of clouds