Which of the following is directly responsible for the shape of an enzyme/protein?

The amino acid sequence of the protein and the properties of the amino acids that make up the protein.

The temperature of the surrounding environment.

The pH of the surrounding environment.

The amount of substrate present.

All of the following statements are correct about enzymes EXCEPT

they raise the energy of activation of all reactions

they enable reactions to occur at a relatively low temperature

they remain unchanged during a reaction

they are often located within the plasma membrane of a cell

If a mutation occurs in a DNA sequence that codes for an enzyme, what is the most likely result?

The enzyme will most likely fold in a way that makes its shape incompatible with the substrate and the enzyme will not function correctly.

There will likely be no change in the shape and function of the enzyme.

The enzyme will not be produced at all.

The enzyme will have an enhanced ability to bind with the substrate.

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

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

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

Zinc, an essential trace element for most organisms, is present in the active site of the enzyme carboxypeptidase. The zinc most likely functions as a(n):

cofactor necessary for enzyme activity

competitive inhibitor of the enzyme

noncompetitve inhibitor of the enzyme

allosteric activator for the enzyme

a specific substrate in which they act upon

The diagram represents one way an enzyme can be inhibited. Which statement explains the effect of an inhibitor on an enzyme?

A substrate will be unable to attach to the enzyme.

A substrate will be able to bond with the enzyme.

The enzyme will likely be attacked by immune cells.

The enzyme will be unable to produce more enzymes.

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 graphs show the reaction rate for an enzyme across a range of temperatures and pH. Based on these data, this enzyme functions best as what temperature and pH?

Temperature of 37oC and a pH of 6

Temperature of 27oC and a pH of 4

Temperature of 40oC and a pH of 8

Temperature of 50oC and a pH of 10

What happens to the rate of reaction in a test tube when a competitive inhibitor is added?

The reaction slows down because the competitive inhibitor binds to the enzyme

The reaction speeds up because the competitive inhibitor helps the enzyme

The reaction rate speeds up because the enzyme’s shape is changed

There is no impact on the reaction rate because the inhibitor is competitive

The reaction slows down because the enzyme’s shape is changed

Which explanation best fits the graph for pH's effect on an enzyme?

Larger numbers of H+ & OH- ions distort the active site

As the pH gets closer to neutral more H-Bonds are broken

There are more collisions between substrates and active sites near the optimal pH

Low pHs cause more H-Bonds to happen near the active site

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.

Enzymes AP Bio

Authored by Athena Palma

Biology

11th - 12th Grade

NGSS covered

Used 74+ times

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

What type of macromolecule are enzymes?

Protein

Carbohydrate

Lipid

Nucleic Acid

Tags

NGSS.MS-LS1-7

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement is true concerning the structure of proteins?

The primary structure is the sequence of amino acids.

Alpha helix and beta sheet are examples of secondary structure.

Side chains (R-groups) of amino acids can be polar or nonpolar

All statements are true.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which of the following correctly describes how enzymes work?

they lower the energy of the reactants to increase the rxn rate

they supply energy to the reaction to increase the rxn rate

they lower the energy of the products to increase the rxn rate

they lower the activation energy of the reaction to increase the rxn rate

Tags

NGSS.HS-PS1-5

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

The energy needed to start a reaction

activation energy

adhesion energy

chemical energy

cohesion energy

Tags

NGSS.HS-PS1-4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Enzymes are made up of these repeating monomers.

monosaccharides

amino acids

nucleotides

phospholipids

Tags

NGSS.HS-LS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of these is NOT true?

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

Enzymes can only be used once in a chemical reaction.

Extreme pH can denature enzymes.

Enzymes speed up chemical reactions.

Tags

NGSS.HS-PS1-5

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Enzymes AP Bio

What type of macromolecule are enzymes?

Which statement is true concerning the structure of proteins?

Which of the following correctly describes how enzymes work?

What 3 letters do enzymes typically end in?

The energy needed to start a reaction

Enzymes are made up of these repeating monomers.

Which of these is NOT true?

The part of the enzyme that the substrate bonds to is called the _____.

Which of the following is directly responsible for the shape of an enzyme/protein?

Which of these is most likely an enzyme?

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