Holt Modern Biology 1st Edition by John Postlethwait ,Janet Hopson

Exercise 20

Interpreting Graphics The graph below shows the rate of ATP production by a culture of yeast cells over time. At the time indicated by the dashed line, cyanide was added to the culture. Cyanide blocks the flow of electrons to O₂ from the electron transport chain in mitochondria. Explain why adding cyanide affects ATP production in the way indicated by the graph.