SEM2 BIOMATE CELLULAR RESPIRATION

Process X occurs during the Krebs cycle produces ATP. What is process X?

• Chemiosmosis
• Oxidative phosphorylation
• Photophosphorylation
• Substrate level phosphorylation

When hydrogen ions (protons) are pumped across the inner mitochondrial membrane, they form a proton gradient. ATP is then formed by a process known as:

• glycolysis.
• the citric acid cycle.
• chemiosmosis.
• substrate-level phosphorylation.

During the Krebs cycle,

• substrate-level phosphorylation occurs.
• oxaloacetate is regenerated.
• electrons and H+ are transferred to coenzymes NAD+ and FAD.
• all of the above occur

Which of the following cells produce 38 ATP molecules through aerobic respiration?

• Cardiac cell

• Liver cell

• Skeletal muscle cell

• Brain cell

Carbon dioxide (CO2) is released during which of the following stages of cellular respiration?

• Glycolysis and the oxidation of pyruvate to acetyl CoA.
• Oxidation of pyruvate to acetyl CoA and the citric acid cycle.
• The citric acid cycle and oxidative phosphorylation.
• Oxidative phosphorylation and fermentation.

At the end of the Krebs (citric acid) cycle, most of the energy removed from the glucose molecule has been transferred to …

• NADH and FADH2.
• ATP.
• oxaloacetic acid.
• citric acid.

In the electron transport system, the final acceptor of electron is …

• cytochrome c reductase.
• cytochrome c oxidase.
• oxygen.
• ubiquinone (substance Q).

All of the following statements about glycolysis are true EXCEPT …

• glycolysis has steps involving oxidation-reduction reactions.
• the enzymes of glycolysis are located in the cytosol of the cell.
• glycolysis can operate in the complete absence of O2 .
• the end products of glycolysis are CO2 and H2O.

During glycolysis, glucose is split into …

• two pyruvic acid molecules.
• two lactic acid molecules.
• one lactic acid plus one ethanol molecule.
• two coenzyme A molecules.

Energy released by the electron transport chain is used to pump H+ into which location?

• Cytosol
• Mitochondrial outer membrane
• Mitochondrial inner membrane
• Mitochondrial intermembrane space