Which occurs when a hemoglobin molecule binds oxygen in the lungs?a The first O2 molecule binds more easily than the last O2 molecule.b Each heme group can reversibly bind four O2 molecules simultaneously.c Salt bridges between subunits break as the first O2 binds.d Cooperative binding of O2 causes the four subunits to dissociatee An iron atom is removed from a porphyrin group.

Inside the hemoglobin molecule which is basically protein, every subunit have a heme group and every…

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Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Which occurs when a hemoglobin molecule binds oxygen in the lungs?

a		The first O₂ molecule binds more easily than the last O₂ molecule.
b		Each heme group can reversibly bind four O₂ molecules simultaneously.
c		Salt bridges between subunits break as the first O₂ binds.
d		Cooperative binding of O₂ causes the four subunits to dissociate
e		An iron atom is removed from a porphyrin group.

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