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Allosteric Effects

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

1.2 and 4.5
4.5 and 1.2
1.0 and 2.8
2.8 and 1.0

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Allosteric Effects
A protein that shows infinite cooperative for binding of n ligands will

only be found in either the unliganded form or the fully liganded form
show a Hill coefficient (nH) of 0.0
both (b) and (c)
show a Hill coefficient (nH) of n

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Allosteric Effects
Small molecules affect hemoglobin (Hb) by

increasing [H+] and decreasing Hb affinity for O2
decreasing Hb affinity for O2
increasing [H+]
increasing Hb affinity for O2

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Allosteric Effects
A protein that binds two ligands in a non-cooperative manner will show

a linear Scatchard Plot
both (b) and (c)
a sigmodial binding curve
a hyperbolic binding curve

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

None of these
1
not defined
2

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Allosteric Effects
An allosteric activator

both (a) and (c)
stabilizes the R state of the protein
decreases the binding affinity
increases the binding affinity

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