Prelab 1.5 Enzymes: Toothpickase

Toothpickase

AP Biology

Prelab

Our upcoming lab will investigate factors that influence enzyme activity. Enzymes are a little bit sensitive; their activity depends substantially on the environmental circumstances surrounding them.

Review some key terms related to enzymes and enzyme activity.

Pro tip: You can SCROLL down some drag and drop questions!

Drag and Drop

A(n) ​ ​

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is any chemical agent that speeds up a reaction without being consumed in the reaction. They belong to the ​

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macromolecule group.

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enzyme

antibody

protein

carbohydrate

lipid

nucleic acid

Drag and Drop

Normally, the activation energy for a reaction is supplied in the form of ​

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from the surroundings. In an enzymatic reaction, a(n) ​

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binds to the active site of the enzyme, and the enzyme lowers the activation energy barrier. 

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heat

substrate

light

oxygen

product

enzyme

amino acid

Multiple Select

Which of the following conditions might affect the activity of an enzyme?

Choose ALL that apply.

• temperature

• pH

• salt

• enzyme concentration

• substrate concentration

Match

Use the diagram to assign labels.

• active site

• enzyme

• substrate

• enzyme-substrate complex

• products

A

B

C

D

E

• A

• B

• C

• D

• E

Match

Use the diagram to assign labels.

• change in free energy for the reaction

• activation energy of the catalyzed reaction

• activation energy of the uncatalyzed reaction

A

B

C

• A

• B

• C

Multiple Select

Which of the following terms describe(s) this reaction?

Choose ALL that apply.

• anabolic

• catabolic

• exergonic

• endergonic

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A dehydration synthesis reaction is ​

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and ​

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energy.



A hydrolysis reaction is ​

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and ​

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energy.

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anabolic

absorbs

catabolic

releases

Multiple Choice

Enzymes always return to their original state after a reaction.

• True

• False

Multiple Choice

An enzyme speeds up a chemical reaction in the cell but can only be used once.  True or False? 

• True

• False

Multiple Choice

In general, enzymes do NOT:

• bind permanently to their substrates

• have names ending in -ase

• have their function changed with extremely high temperatures

• react with a specific substrate