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 denature

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 .

Some bacteria live in hot springs. Their cells contain enzymes that function best at temperatures of 70 °C or higher. At the temperature of 50 °C, how will the enzymes in these bacterial cells most likely be affected?

The enzymes will not increase the rate of reactions as much as they would at 70 °C.

The enzymes will be destroyed by lysosomes

The enzymes will lose their bond structure and fall apart.

The enzymes will require less energy to function than at 70 °C.

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

increasing the temperature of the cell

increasing the concentration of reactants

The following are all functions of proteins except:

Control rate of reactions - enzymes

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.

Biomolecule/enzyme quiz

Quiz

•

Biology

•

9th Grade

•

Practice Problem

•

Hard

•

NGSS

HS-PS1-5, HS-LS1-1, HS-LS1-6

+3

Standards-aligned

Grace Newsom

FREE Resource

35 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Enzymes are an example of

Lipids

Carbohydrate

Protein

Nucleic Acid

What is the purpose of an enzyme?

give permission for the reaction

raise activation energy

speed up reactions

control how many reactions occur

What 3 letters do enzymes typically end in?

-ose

-ase

-ese

-tic

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In the diagram, what is letter A?

product

substrate

enzyme-substrate complex

active site

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Letter D...

active site

enzyme

substrate

products

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Letter B...

active site

enzyme

substrate

products

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Letter C...

active site

enzymes

substrate

products

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Biomolecule/enzyme quiz

35 questions

Enzymes are an example of

What is the purpose of an enzyme?

What 3 letters do enzymes typically end in?

In the diagram, what is letter A?

Letter D...

Letter B...

Letter C...

Letter E...

In a chemical reaction, ________ are what you have at the end

An enzyme speeds up a reaction by

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