After a substrate binds to an enzyme,

the enzyme can start the reaction again once the products are released

the substrate and enzyme are joined permanently

the enzyme cannot be used in the reaction again

the enzyme is destroyed in the chemical 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

gaining electrons, losing oxygen

gaining electrons; gaining oxygen

losing electrons; losing oxygen

losing electrons; gaining oxygen

gaining electrons; gaining oxygen

losing electrons; losing oxygen

gaining electrons; losing oxygen

Enzymes need certain environmental conditions in order to function properly. What happens when enzymes are heated to a high temperature?

they change their amino acid sequence

This is the most important factor about an enzyme that determines what job it will do in the body.

The sugars that make up the enzyme

The nucleic acids that make up the protein

The fatty acids that make up the protein

Sucrase has an optimum temperature of 37 C and an optimum pH of 6.2. What would happen if the pH changed from 6 to 3?

The reaction sucrase catalyzes would slow down

Sucrase would continue to work the same

The reaction sucrase catalyzes would speed up

What effect do low temperatures have on enzymatic activity?

Low temperatures means molecules are moving slower and so reaction rate is low

Low temperatures denature enzymes and slows reactions

Low temperatures change the structure of substrates and slow reactions

Enzymes work best at low temperatures

Why does enzyme activity decrease when it is in solution that has either a too high or too low pH?

The shape of the active site changes

All enzymes only work in neutral solutions

Enzyme activity remains unchanged in different pH's

The shape of the substrate changes

AP Biology Unit 3 Enzymes

Authored by Charles Martinez

Biology

11th - 12th Grade

NGSS covered

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

What 3 letters do enzymes typically end in?

-ose

-ase

-ese

-tic

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Enzymes are

Protiens

Lipids

Carbohydrates

DNA

Tags

NGSS.HS-LS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In an Exergonic reaction, heat is ________.

Absorbed

Created

Destroyed

Released

Tags

NGSS.HS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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 .

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

On an enzyme, the site that attaches to a substrate

Polypeptide

Base

Substrate

Active site

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Is this reaction endergonic or exergonic?

Exergonic

Endergonic

Tags

NGSS.HS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Is this reaction endergonic or exergonic?

Exergonic

Endergonic

Tags

NGSS.HS-PS1-4

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AP Biology Unit 3 Enzymes

What 3 letters do enzymes typically end in?

Enzymes are

In an Exergonic reaction, heat is ________.

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

On an enzyme, the site that attaches to a substrate

Is this reaction endergonic or exergonic?

Is this reaction endergonic or exergonic?

What is structure A?

What is structure D?

What is structure C?

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