Respiration involve the breakdown of sugar this process in the production of energy for the cell

answer; ///(b) it is composed of four protein chains and four heme groups;

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

c is the correct answer hope this !