Independent Practice: Enzymes

Enzymes are a form of which biomolecule?

• carbohydrates

• proteins

• nucleic acids

• lipids

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NGSS.HS-LS1-1

Enzymes are polymers composed of which smaller subunits?

• sugars

• nucleotides

• glycosides

• amino acids

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NGSS.HS-LS1-6

How many types of reactions can a specific enzyme direct?

• A wide variety of reactions

• B only a specific reaction

• C exactly 5 different reactions

• D every reaction in the cell

Enzymes perform which of the following functions within living cells?

• inhibiting the translation of proteins

• providing structural stability

• transmitting ultraviolet rays

• catalyzing chemical reactions

Label the diagram using the list of terms shown below.

a

b

c

d

e

Substrate

Enzyme

Enzyme-Substrate Complex

Products

Active Site

Enzymes are known as biological catalysts because they -

• speed up chemical reactions

• slow down reaction rates

• increase the activation energy

• reduce the polarity of water

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NGSS.HS-LS1-7

NGSS.HS-PS1-5

What do we call the amount of energy required to start a chemical reaction?

• Activation energy

• Potential energy

• Kinetic energy

• Thermal energy

How does the presence of an enzyme affect the amount of energy needed to start the reaction?

• The presence of an enzyme lowers the amount of activation energy needed to start the reaction.

• The presence of an enzyme increases the amount of activation energy needed to start the reaction.

• The presence of an enzyme has no effect on the activation energy needed to start the reaction.

• The presence of an enzyme completely eliminates the need for activation energy.

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NGSS.HS-PS1-4

How is the rate of a reaction affected by enzymes?

• Enzymes increase the rate of a reaction.

• Enzymes decrease the rate of a reaction.

• Enzymes have no effect on the rate of a reaction.

• Enzymes stop the reaction completely.

Tags

NGSS.HS-PS1-5

Because enzymes act this way, we say that they -

• digest reactions

• convert reactions

• reverse reactions

• catalyze reactions