Biochemistry - Allosteric Effects

Why Biochemistry Allosteric Effects?

In this section you can learn and practice Biochemistry Questions based on "Allosteric Effects" and improve your skills in order to face the interview, competitive examination and various entrance test (CAT, GATE, GRE, MAT, Bank Exam, Railway Exam etc.) with full confidence.

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You can easily solve all kind of Biochemistry questions based on Allosteric Effects by practicing the objective type exercises given below, also get shortcut methods to solve Biochemistry Allosteric Effects problems.

Exercise :: Allosteric Effects - Section 1

  • Allosteric Effects - Section 1
1. 

The conformational changes from the T to the R state is initiated by

A. binding of oxygen to the heme
B. movement of the proximal histidine towards the heme
C. movement of the F-helix, which contains the proximal His
D. reorganization of protein-protein contacts between the individual subunits

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

2. 

An allosteric activator

A. increases the binding affinity
B. decreases the binding affinity
C. stabilizes the R state of the protein
D. both (a) and (c)

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

3. 

Bisphosphoglycerate (BPG) cannot bind to the oxygenated R state of hemoglobin because

A. it is displaced from the heme by oxygen
B. it is displaced from the heme by movement of the proximal histidine
C. its binding pocket becomes too small to accommodate BPG
D. BPG binds to the R state with the same affinity as the T state

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

4. 

The Hill coefficient (nH) for myoglobin and hemoglobin are respectively

A. 2.8 and 1.0
B. 1.0 and 2.8
C. 1.2 and 4.5
D. 4.5 and 1.2

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

5. 

When protein binds two ligands in a non-cooperative manner, then the x-intercept of the Scatchard Plot is

A. 1
B. 2
C. not defined
D. none of the above

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.