Enzyme Regulation - Allosteric Enzymes

Question 1 of 7

1

Which answer best describes Allosteric Enzymes?

Select one of the following:

Allosteric enzymes are multi-subunit proteins with one or more active site on each subunit.
Allosteric enzymes are multi-subunit proteins with one active site on their subunit.
Allosteric enzymes are proteins involved in making and breaking of covalent bonds.

Explanation

Question 2 of 7

1

What type of graphical representation best describes the activity of Allosteric Enzymes?

Select one of the following:

Hyperbolic Curve
Sigmoidal Curve
Linear Regression

Explanation

Question 3 of 7

1

Allosteric Enzymes are said to behave cooperatively, choose the answer that best describes this behaviour?

Select one of the following:

The binding of a substrate at one active site induces a conformational change in the protein that is conveyed to other active sites and altering their affinity for substrate molecules.
The binding of a substrate at one active site inhibits a conformational change in the protein.
The binding of a substrate at one active site induces a conformational change in the protein that is conveyed to other active sites and does not affect the affinity for substrate molecules.

Explanation

Question 4 of 7

1

Choose the two models that describe Allosteric Enzymes and their effects on proteins?

Select one or more of the following:

Concerted Model
Ping-Pong Model
Michelis-Menten Model
Sequential Model

Explanation

Question 5 of 7

1

Aspartate Carbamoyltransferase ATCase is an example of an allosteric enzyme, What process is it involved in?

Select one of the following:

Synthesis of Pyrimidine – the formation of N-carbamoylaspartate.
Synthesis of Proteins - the formation of Peptide Bonds
Synthesis of Purines - the formation of Adenylate

Explanation

Question 6 of 7

1

What enzyme acts as an allosteric inhibitor in the synthesis of pyrimidines?

Select one of the following:

Cytosine Triphosphate
Adenine Triphosphate
Cytosine Diphosphate

Explanation

Question 7 of 7

1

What intermediate is formed in the synthesis of pyrimidines? What is the role of this intermediate?

Select one of the following:

Adenosine Tri Phosphate, ATP - Allosteric Inhibitor
Adenosine Di Phosphate, ADP - Allosteric Activator
Adenosine Tri Phosphate, ATP - Allosteric Activator

	Created by jill.examtime almost 11 years ago

	Copied by daniel.praecox almost 11 years ago

This quiz assesses the content covered in the notes and flash cards concerning regulation of allosteric enzymes.

Enzyme Regulation - Allosteric Enzymes

Question 1 of 7

Which answer best describes Allosteric Enzymes?

Select one of the following:

Explanation

Question 2 of 7

What type of graphical representation best describes the activity of Allosteric Enzymes?

Select one of the following:

Explanation

Question 3 of 7

Allosteric Enzymes are said to behave cooperatively, choose the answer that best describes this behaviour?

Select one of the following:

Explanation

Question 4 of 7

Choose the two models that describe Allosteric Enzymes and their effects on proteins?

Select one or more of the following:

Explanation

Question 5 of 7

Aspartate Carbamoyltransferase ATCase is an example of an allosteric enzyme, What process is it involved in?

Select one of the following:

Explanation

Question 6 of 7

What enzyme acts as an allosteric inhibitor in the synthesis of pyrimidines?

Select one of the following:

Explanation

Question 7 of 7

What intermediate is formed in the synthesis of pyrimidines? What is the role of this intermediate?

Select one of the following:

Explanation