Chemical reactions always involve

the breaking of bonds in reactants and the formation of new bonds in products.

the breaking of bonds in reactants.

the formation of new bonds in products.

An enzyme speeds up a reaction by

lowering the activation energy.

Which of these is NOT true?

Enzymes can only be used once in a chemical reaction.

Enzymes can denature (change shape) when the temperature gets too high.

Extreme pH can denature enzymes.

Enzymes speed up chemical reactions.

What happens when enzymes are heated to a high temperature?

The shapes of the enzyme are altered or denatured

The enzymes' amino acid sequence changes.

Which of the following conclusions can be drawn from this graph?

The optimum pH of the enzyme is 6.6.

The optimum pH of the enzyme is 5.8

The enzyme’s activity increases as pH increases 5.0 to 9.0

The enzyme’s activity is greater around pH of 8.0 .

The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?

Enzyme decrease the activation energy of the reaction.

Enzymes increase the energy of the reactants.

Enzymes decrease the energy level of the products.

Enzymes reverse the direction of the reaction.

A substance that speeds up a rate of chemical reaction.

Molecules that make enzymes work harder and faster

A substance that slows down a rate of chemical reaction.

The graph shows the effect of temperature on enzyme action. What characteristic do enzymes E 1 , E 2 , and E 3 share?

Their activity is at a low level between 15°C and 25°C.

Their activity increases between 20°C and 30°C.

Their activity is greatest between 5°C and 10°C.

Their activity is at a high level between 30°C and 40°C.

Enzymes are made of fatty acids.

Enzymes speed up chemical reactions.

Enzymes react best at a specific temperature.

Enzymes only control ONE type of reaction.

Which of the following best explains why enzymes are necessary for reactions in our cells?

The reactions are too slow to meet the needs of the cell if enzymes are missing.

Enzymes supply the oxygen necessary for the reactions.

Enzymes change reactants from solid to liquid during the reactions.

The reactions take up too much space in the cell if enzymes are missing.

A baby is locked in the car on a hot day. What is most likely to happen to the child?

The child's enzymes will denature causing chemical reactions to slow down in the body, which will lead to death.

The child's body will adjust and cause it to maintain homeostasis

The child's enzymes will denature causing chemical reactions to speed up in the body, which will lead to death.

The activation energy for chemical reactions will remain unchanged and therefore the child will live.

Enzymes are _______________ that _____________________ chemical reactions by ____________ the amount of activation energy required to start the reaction.

carbohydrates, slow down, lowering

How does an enzymes shape relate to its function?

the enzyme is shaped specially for certain substrates to perform a specific reaction

the shape of the enzyme has no relation to its function

the enzyme shape acts as a receptor to certain products

the enzyme shape can fit into specific substrates to cease a reaction

Fireflies emit light. The production of light by an organism is called bioluminescence. To generate visible light, cells in a firefly’s tail produce thousands of luciferase enzymes. Luciferase binds to a chemical called luciferin. Once bound, the luciferase enzyme speeds up a chemical reaction that combines an oxygen molecule and luciferin to produce oxyluciferin. This reaction requires energy and releases light. Which of the following best describes how the luciferase enzyme speeds up the chemical reaction?

Luciferase decreases the amount of energy required for the reaction to start.

Luciferase increases the amount of time the light is visible.

Luciferase increases the number of sites on luciferin that must bind to oxygen.

Luciferase decreases the temperature of the environment inside the body of the firefly.

AP Enzymes Review 2023

Authored by Kris Hodge

Biology

10th Grade

NGSS covered

Used 40+ times

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100 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Enzymes are an example of

Lipids

Carbohydrate

Protein

Nucleic Acid

Tags

NGSS.MS-LS1-7

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the purpose of an enzyme?

give permission for the reaction

raise activation energy

speed up reactions

control how many reactions occur

Tags

NGSS.MS-LS1-7

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Enzymes are capable of increasing the rate of a chemical reaction within a living cell. Enzymes accomplish this through which of the following means?

reducing the number of products

reducing the activation energy

increasing the temperature of the cell

increasing the concentration of reactants

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Each enzyme only has 1 substrate that will fit its active site. What is this called?

reusable

catalyst

specific

fragile

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What 3 letters do enzymes typically end in?

-ose

-ase

-ese

-tic

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Any substance that is acted upon by an enzyme is called a(n)?

Coenzyme

Substrate

Vitamin

Polypeptide

MULTIPLE CHOICE QUESTION

1 min • 1 pt

After the enzyme and substrate bind together and perform the reaction, what does the substrate become?

a substrate

an enzyme

a product

an active site

Tags

NGSS.MS-LS1-7

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AP Enzymes Review 2023

Enzymes are an example of

What is the purpose of an enzyme?

Enzymes are capable of increasing the rate of a chemical reaction within a living cell. Enzymes accomplish this through which of the following means?

Each enzyme only has 1 substrate that will fit its active site. What is this called?

What 3 letters do enzymes typically end in?

Any substance that is acted upon by an enzyme is called a(n)?

After the enzyme and substrate bind together and perform the reaction, what does the substrate become?

In the diagram, what is letter A?

Letter D...

Letter B...

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