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

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

Enzyme Regulation - 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