Chapter·BiochemistryHemoglobin and Iron Metabolism

Oxygen Transport and Oxygen-Hemoglobin Dissociation CurveDownloads

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Sample Questions

1

Which factor predominantly influences the rightward shift of the oxygen dissociation curve?

ApH (Bohr effect)

B2,3-Bisphosphoglycerate (2,3-BPG)

CTemperature increase

DCarbon monoxide levels

2

The oxygen-hemoglobin dissociation curve is sigmoid because

ABinding of one oxygen molecule decreases the affinity of binding other O2 molecules

BOxygen affinity of Hemoglobin decreases when the pH of blood falls

CBinding of oxygen to Hemoglobin reduces the affinity of Hb for CO2

DBinding of one oxygen molecule increases the affinity of binding other O2 molecules

3

Which poison shows cherry red discoloration of blood but normal PaO2 on blood gas analysis?

ACyanide

BHydrogen sulfide

CCarbon monoxide

DNitrites

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