<prompt> Binding of oxygen to myoglobin:Is characterized by the sigmoidal saturation curveOccurs at multiple sitesIs characterized by the sigmoid and multiple hyperbolic saturation curveIs characterized by the hyperbolic saturation curve  <response>: Myoglobin molecule contains a single O2 binding site and thus the saturation process is characterized by a simple hyperbolic curve, in contrast to hemoglobin, sigmoid saturation curve of which shows positive cooperativity of multiple oxygen binding sites. Ref: Lippincotts Biochemistry, 5th Ed page 26 