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SAT® Subject Test in Biology

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Subunit Binding

SATBIO-TVBDO2

Hemoglobin is composed of four subunits. When one subunit binds to oxygen, it increases the chances that the other three subunits will also bind to oxygen.

What is this type of activity called?

A

Inhibition

B

Cooperativity

C

Enzyme substrate complex

D

Catalysis

E

Activation