Ch 9 Cellular Respiration Activity: Glucose Metabolism

true or false? The potential energy in an ATP molecule is derived mainly from its three phosphate groups.

true .The three phosphate groups in an ATP molecule carry negative charges that strongly repel each other and give ATP a large amount of potential energy.

True or false? The reactions that generate the largest amounts of ATP during cellular respiration take place in the mitochondria.

true.Glycolysis takes place in the cytoplasm, whereas the Krebs cycle and the electron transport chain, which generate the largest amounts of ATP during cellular respiration, take place in the mitochondria.

Which of the following statements about the electron transport chain is true?

NADH and FADH2 donate their electrons to the chain....The electrons lose energy as they move down the chain, and this energy is used to create a proton gradient that drives the synthesis of ATP.

Which step of the cellular respiration pathway can take place in the absence of oxygen?

Glycolysis; can take place in the absence of oxygen; its product, pyruvate, enters the cellular respiration pathway or undergoes fermentation depending on the availability of oxygen.

Into which molecule are all the carbon atoms in glucose ultimately incorporated during cellular respiration?

carbon dioxide. All of the carbon atoms in glucose are incorporated into carbon dioxide: Two molecules are formed as pyruvate is converted to acetyl CoA, and four molecules are formed during the Krebs cycle.

Which stage of glucose metabolism produces the most ATP?

Electron transport and chemiosmosis (oxidative phosphorylation) can yield around 26 molecules of ATP.

Which process is not part of the cellular respiration pathway that produces large amounts of ATP in a cell?

Fermentation is an alternate pathway used when oxygen levels are low.

Which molecule is metabolized in a cell to produce energy for performing work?

Glucose is used to produce high-energy ATP in a cell.