How does hemoglobin bind O2 cooperatively? A. The binding of one molecule of O2 to one subunit of hemoglobin enhances the assembly of other subunits to form a complete hemoglobin protein. B. The binding of one molecule of O2 to one hemoglobin protein enhances the binding of a molecule of O2 to a different hemoglobin protein. C. The binding of one molecule of O2 to one subunit of hemoglobin enhances the affinity of the same subunit for more molecules of O2. D. The binding of one molecule of O2 to one subunit of hemoglobin enhances the affinity of other subunits for O2.

In a floodplain or swampy environment would individuals with a mutation of a decreased ability to withstand temperature changes to an overall decrease in fatty tissue would be or less well adapted to their environment? why?

In squirrels and chipmunks, as in humans, cholesterol is removed from the circulation, first by complexing with Low Density Lipoproteins (LDLs). Next, the cholesterol-LDL complex is bound to LDL receptors found predominantly on the surface of liver cells, which then undergo receptor-mediated endocytosis, thus removing the LDL-cholesterol from the blood serum. Inside the cells, a drop in pH causes the LDLs to separate from their receptors, and the receptors are ultimately returned to the cell surface via exocytosis.  You are surprised to discover that in both squirrels and chipmunks, certain individuals are predisposed to suffering heart attacks at an early age, and these early heart attacks are linked to the presence of a mutation in the gene that codes for their LDL receptors.  This is where the similarity ends.  Closer examination of the chipmunks suffering from elevated serum cholesterol levels reveals that many individuals that are homozygous for the Fa allele also have large,…

Identify the human form of hemoglobin that is produced most abundantly in the adult.A. two -globin chains (alpha) and two -globin chains (beta)B. two -globin chains (beta) and two -globin chains (gamma)C. two -globin chains (gamma) and two -globin chains (delta)D. two -globin chains (delta) and two -globin chains (epsilon)E. two -globin chains (epsilon) and two -globin chains (zeta)