An enzyme speeds up a reaction by

lowering the activation energy.

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 best describes how the shape of an enzyme affects its function?

It determines the specific reaction it will catalyze.

It determines the raw products needed for the reaction.

It determines whether a reaction will be slowed or sped up.

It determines the products that will result from the reaction.

Which role do enzymes play in cells?

They are biocatalysts that decrease the activation energy in chemical reactions.

They are biosubstrates that speed up chemical reactions.

They are biosubstrates that decrease chemical reactions.

They are biocatalysts that increase and decrease the activation energy in chemical reactions.

The table below lists the type of proteins and their possible functions. Which function could best be substituted for number 1?

binds to oxygen in red blood cells

The graph below shows the relationship between the effect of temperature and enzyme activity. What could occur to the enzyme activity level if the temperature was increased to 60 °C?

There would be no activity because the enzyme would be denatured.

The activity level would be equal to that at 30 °C.

The activity level would be equal to that at 20 °C.

The activity level would be twice that at 30 °C because temperature increases result in increased enzyme activity.

An enzyme works optimally at a pH between 2 and 4. Which best explains what will happen to this enzyme at a pH of 12?

It will lose its original shape and not work on any substrate at all.

It will lose its original shape and work on new substrates.

It will work on a different substrate than at a pH range of 2–4.

It will work on the same substrate as it did at a pH range of 2–4, but it will not work as well.

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.

Enzymes

Quiz

•

Biology

•

10th Grade

•

Practice Problem

•

Easy

•

NGSS

MS-LS1-7, HS-PS1-4, HS-PS1-5

+5

Standards-aligned

Laura Cains

Used 56+ times

FREE Resource

30 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Enzymes are an example of

Lipids

Carbohydrate

Protein

Nucleic Acid

Tags

NGSS.MS-LS1-7

2.

MULTIPLE CHOICE QUESTION

30 sec • 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

3.

MULTIPLE CHOICE QUESTION

30 sec • 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-PS1-4

NGSS.HS-PS1-5

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What 3 letters do enzymes typically end in?

-ose

-ase

-ese

-tic

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

Coenzyme

Substrate

Vitamin

Polypeptide

6.

MULTIPLE CHOICE QUESTION

30 sec • 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

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the diagram, what is letter A?

product

substrate

enzyme-substrate complex

active site

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Enzymes

30 questions

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?

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...

Letter C...

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