The graph above describes the energy change that results from a chemical reaction. To what is that energy change due?
A a reaction that requires ATP
B a reaction that requires ADP
C the breakdown of ATP to ADP and phosphate
D the synthesis of ATP from ADP and phosphate

Which of the following are not matched correctly? cd8+: directly destroy infected or cancerous cells t reg cell: reduce the adaptive response once threat passes t l: activate cellular branch (cytotoxic t cells, macrophages, nk cells) t 2: stimulate b cells to make antibodies t (cd4+): mhc i