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.

Why does the shape of an enzyme determine its function?

enzymes are specific to substrates (lock and key)

enzymes can work with any substrate

enzymes are activated by molecules

The induced fit model of enzyme activity suggests which of the following?

the binding of substrate depends on the conformation of the active site

the binding of an activator alters the active site to enable binding of products more tightly

binding of substrate changes the conformation of the active site to bind substrate more tightly

binging of competitive inhibitors changes the shape of the active site to bind substrate less tightly

Some bacteria are metabolically active in hot springs because ____________

their enzymes have high optimal temperatures

their enzymes are insensitive to temperature

they use molecules other than proteins as their main catalysts

they are able to maintain an internal temperature much cooler than that of the surrounding water

At high temperatures enzyme activity declines because of:

Dissociation of Ionic Compounds

In non-competitive inhibitor, the allosteric inhibitor

Binds to the enzyme at a site away from the active site, altering the shape of the enzyme

Binds to the active site, preventing the substrate from binding to the enzyme

Binds to the substrate, preventing it from binding to the active site

Changes the pH of the environment that the enzyme acts in

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.

How do non-competitive inhibitors affect enzymes?

It changes the shape of the enzyme

It binds to the active site, blocking the substrate

It increases the activation energy

It decreases the activation energy

How do competitive inhibitors affect enzymes?

It binds to the active site, blocking the substrate

It changes the shape of the enzyme

It increases the activation energy

It decreases the activation energy

What is the reason for the rate of reaction plateauing after a certain point?

All enzymes have been saturated with substrates

There are no open active sites available to receive substrates

There are many active sites available to receive substrates

The enzymes have become denatured

changing the order of the reaction

Enzymes (3.1 + 3.2 + 3.3)

12th Grade

•

35 Qs

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Enzymes (3.1 + 3.2 + 3.3)

Quiz

•

Biology

•

12th Grade

•

Practice Problem

•

Medium

•

NGSS

HS-PS1-4, HS-PS1-5, HS-PS1-2

Standards-aligned

Amany Ezzeldein

Used 19+ times

FREE Resource

About this resource

This comprehensive quiz covers enzyme structure, function, and kinetics as well as fundamental concepts of cellular energetics, making it appropriate for 12th grade AP Biology students. The questions assess students' understanding of enzyme mechanisms including the induced fit model, competitive and non-competitive inhibition, and the relationship between enzyme structure and specificity. Students must demonstrate knowledge of how environmental factors like temperature and pH affect enzyme activity, interpret graphs showing optimal conditions and saturation kinetics, and distinguish between endergonic and exergonic reactions. The quiz requires students to analyze energy diagrams, understand activation energy concepts, and connect metabolism to anabolic and catabolic processes. To succeed on this assessment, students need a solid foundation in protein structure, chemical thermodynamics, and the ability to interpret scientific data presented in graphical format. Created by Amany Ezzeldein, a Biology teacher in AE who teaches grade 12. This quiz serves as an excellent comprehensive assessment tool covering multiple units on enzymes and cellular energetics that can be effectively used for end-of-unit review, cumulative practice before AP exams, or as a formative assessment to identify areas requiring additional instruction. The diverse question formats, including diagram interpretation and graph analysis, make it particularly valuable for reinforcing visual learning and data interpretation skills essential for advanced biology coursework. Teachers can deploy this quiz as a homework assignment to reinforce classroom learning, use selected questions as warm-up activities to begin enzyme-related lessons, or implement it as a formal assessment to gauge student mastery. The content aligns with AP Biology Learning Objectives 4.A.1, 4.A.2, and 4.B.1, addressing enzyme catalysis, environmental effects on enzyme activity, and energy coupling in biological systems.

35 questions

Show all answers

MULTIPLE CHOICE QUESTION

1 min • 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

What is structure A?

Substrate

Active site

Enzyme

Products

What is structure D?

Substrate

Active site

Enzyme

Products

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is structure C?

Substrate

Active site

Enzyme

Products

MULTIPLE CHOICE QUESTION

1 min • 12 pts

What is structure E, F, G?

Substrate

Active site

Enzyme

Products

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

What 3 letters do enzymes typically end in?

-ose

-ase

-ese

-tic

MULTIPLE CHOICE QUESTION

45 sec • 12 pts

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 .

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Enzymes (3.1 + 3.2 + 3.3)

35 questions

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 is structure A?

What is structure D?

What is structure C?

What is structure E, F, G?

What 3 letters do enzymes typically end in?

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

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

Based on the graph, what is the optimal temperature for this enzyme?

Which of these is NOT true?

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