Which of the following best describes the cellular location where pyruvate dehydrogenase is most likely active? (A) The cytosol
(B) The lysosomes
(C) The nucleus
(D) The mitochondrial matrix

The model illustrates a process by which a substance is taken up by a cell. which statements describe the process? a. the model shows the process of endocytosis. b. the process shown in the model requires energy from the cell. c. the cell membrane in the model remains intact throughout the process. d. the model shows the process of facilitated diffusion.