Enzymes - Assessment

1.

Multiple Choice

1 min

1 pt

This reaction shows a(n) ____________ reaction

Catabolic

Anabolic

Dehydration Synthesis

Halogenation

2.

Multiple Choice

30 sec

1 pt

The area that the substrate fits into on the enzyme is called the:

Active Site

Allosteric Site

DiSulphide Bridge

β-Pleated Sheet

3.

Multiple Choice

20 sec

1 pt

The current model of enzyme action is referred to as the:

Induced Fit Model

Lock & Key Model

Singer-Nicolson Model

Davson-Danielli Model

4.

Multiple Choice

45 sec

1 pt

Enzymes catalyze reactions by ___________ Activation Energy.

Increasing

Decreasing

5.

Multiple Choice

45 sec

1 pt

Enzymes speed up reaction rates by changing:

Activation Energy

pH

Hydrogen Bonds

Kinetic Energy

6.

Multiple Choice

1 min

1 pt

At high temperatures enzyme activity declines because of:

Denaturation

Decreased Kinetic Motion

Increased H-Bonding

Dissociation of Ionic Compounds

7.

Multiple Choice

1 min

1 pt

At low temperatures enzyme activity declines because of:

Denaturation

Decreased Kinetic Motion

Increased H-Bonding

Dissociation of Ionic Compounds

8.

Multiple Choice

45 sec

1 pt

Most enzymes have the ending:

-ase

-ose

-ic acid

-ate

9.

Multiple Choice

45 sec

1 pt

The molecule an enzyme is working on is called the:

Substrate

Solvent

Allosteric Inhibitor

CoEnzyme

10.

Multiple Choice

1 min

1 pt

When a molecule can occupy the same active site as the substrate, a situation called __________________ can result

Competitive lnhibition

Allosteric Regulation

Non-Competitive Inhibition

Feedback Inhibition

11.

Multiple Choice

1 min

1 pt

A receptor site that a molecule can bind to that changes the shape of the active site is called a(n):

Allosteric Site

Active Site

DiSulphide Bridge

MHC Receptor

12.

Multiple Choice

20 sec

1 pt

A molecule binds to an enzyme and opens the active site so it can bind to the substrate. This is called:

Allosteric Activation

Allosteric Inhibition

Competitive Activation

Competitive Inhibition

13.

Multiple Choice

1 min

1 pt

A molecule binds to an enzyme and decreases the ability of the active site to bind to the substrate. This is called:

Allosteric Activation

Allosteric Inhibition

Competitive Activation

Competitive Inhibition

14.

Multiple Choice

1 min

1 pt

Molecules that bind to enzymes and enhance an enzyme's ability are called:

CoFactors

CoEnzymes

Allosteric Inhibitors

Allosteric Activators

15.

Multiple Choice

1 min

1 pt

Organic molecules that temporarily bind to enzymes and enhance an enzyme's ability are called:

CoFactors

CoEnzymes

Allosteric Inhibitors

Allosteric Activators

16.

Multiple Choice

20 sec

1 pt

This type of reaction is a:

Dehydration Synthesis

Neutralization

RedOx Reaction

Phosphorylation

17.

Multiple Choice

30 sec

1 pt

A reaction where electrons are moved around is a:

Neutralization

Hydrolysis

RedOx Reaction

Phosphorylation

18.

Multiple Choice

30 sec

1 pt

An enzyme that changes glucose into fructose would be a(n):

Isomerase

Lyase

Oxidoreductase

Transferase

19.

Multiple Choice

1 min

1 pt

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

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

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

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

20.

Multiple Choice

30 sec

1 pt

What enzyme is likely to catalyze this reaction?

Kinase

OxidoReductase

Isomerase

Transferase

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