AP Biology Cellular Respiration — practice questions
22 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice AP Biology Cellular Respiration in the app →The first pathway used to break glucose down and extract free energy is:Glycolysis begins with one glucose molecule and ends with two molecules of:Glycolysis is described as anaerobic because it:Which molecule carries the acetyl group from pyruvate into the citric acid cycle?The reduced electron carrier produced when NAD+ picks up high-energy electrons is:Paired reactions in which one molecule is oxidised while another is reduced are called:At the end of the electron transport chain, the electrons are finally accepted by:Glycolysis invests two ATP early and forms four ATP later, giving a net gain per glucose of:The enzyme that catalyses the very first step of glycolysis is:Which enzyme cleaves fructose-1,6-bisphosphate into two three-carbon molecules?If NAD+ is unavailable, the second half of glycolysis:The citric acid cycle differs from glycolysis in that it is:The first step of the citric acid cycle joins a two-carbon acetyl group to a four-carbon molecule, forming:Each turn of the citric acid cycle produces how many NADH molecules?Chemiosmosis accounts for roughly what share of the ATP made during glucose catabolism?Making ATP by chemiosmosis is called oxidative phosphorylation because the process involves:How many complexes make up the electron transport chain?The mobile carrier connecting the first and second complexes to the third is:Hydrogen ions pumped by the electron transport chain accumulate in the:The citric acid cycle is described as amphibolic because its intermediates can also be used to:Where does the carbon dioxide released during cellular respiration come from?In type 2 diabetes the oxidation efficiency of NADH is reduced, which affects: