Describe how pyruvate produced in the cytoplasm is biochemically modified to allow its entry into the Krebs cycle, and explain how the cycle is subsequently initiated in the mitochondrial matrix.
Cyanide is a highly toxic compound that inhibits cytochrome c oxidase, the terminal electron carrier of the electron transport chain. Explain why cyanide poisoning leads to a rapid arrest of the Krebs cycle.
7 exam-style questions on AQA A Level Biology Respiration (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.