A mutation that results in a single amino acid substitution in a region of the enzyme outside of the active site A mutation that results in a single amino acid substitution in a region of the enzyme outside of the active site will almost always destroy the activity of the enzyme. may alter the ability of a competitive inhibitor to bind to the enzyme. may alter the optimal pH for the enzyme. will often change the substrate specificity of the enzyme.

Ryan rears sheep for their wool. recently the quantity of wool that ryan gets has diminished. this is because the new sheep are not that wooly. ryan should add which nutrient to their feed so that the sheep becomes more wooly? a. cornb. ironc. cottonseedd. vitamin a

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

The influenza virus cause the flu, but not other diseases. why?