Enzyme Practice

The process of transferring energy during respiration

occurs in a series of steps. This prevents too much heat

from being released at one time. Maintaining an

appropriate temperature is beneficial to an organism

because

• enzymes need a proper range of temperatures to

  catalyze vital reactions

• cellular waste products can only be excreted in

  cooler temperatures

• hormones can only produce antibodies if

  temperatures are not excessive

• nutrients diffuse faster into cells when

  temperatures are lower

Tags

NGSS.HS-LS1-3

NGSS.HS-LS1-7

Which statement is supported by the information in the

graph?

• The enzymes respond in a similar way to changes

  in temperature.

• The enzymes in bacteria function best at 40°C.

• The enzymes function best at the same

  temperature.

• The enzymes breakdown the same substances.

Which statement describes a characteristic of molecule Z?

• Molecule Z will function at any temperature above 20°C.

• Molecule Z is composed of a string of molecular bases represented by A, T, G, and C.

• Molecule Z will function best at a specific pH.

• Molecule Z is not specific, so this reaction can be controlled by any other chemical in the body.

The graph illustrates that enzymes 1, 2, and 3

• are not affected by pH

• work best at different pH levels

• work best in an acidic environment

• work best in a basic environment

What label could appropriately be used to replace letter Z on the axis?

When small molecules are joined together to form a larger, more complex molecule

• synthesis

• digestion

Tags

NGSS.HS-LS1-6

When large molecules are broken down into smaller building blocks

• synthesis

• digestion

Tags

NGSS.MS-LS1-7

An analogy that explains how enzymes work

• lock and key model

• catalyst

• enzyme

• substrate

Another word for "best"

• enzyme

• catalyst

• pH

• optimal

Tags

NGSS.MS-ETS1-3

When an enzyme changes shape and becomes less effective

• digestion

• enzyme

• denaturation

• optimality