Edexcel IAL Respiration Defintions

What is the function of oxygen in cellular respiration?

• To act as the final electron acceptor in the electron transport chain

• To donate electrons to the electron transport chain

• To accept electrons from NADH and FADH2

• To catalyze the conversion of pyruvate to acetyl-CoA

Where does glycolysis occur in eukaryotic cells?

• Cytoplasm

• Mitochondria

• Endoplasmic reticulum

• Nucleus

What is the final product of the Krebs cycle?

• Acetyl-CoA

• Pyruvate

• Carbon dioxide

• ATP

What is the term for the total ATP yield from one molecule of glucose during aerobic respiration?

• 2 ATP

• 4 ATP

• 30-32 ATP

• 36-38 ATP

What is cellular respiration?

• The process of breathing in oxygen and exhaling carbon dioxide

• The process of breaking down glucose to produce ATP

• The process of synthesizing glucose from carbon dioxide and water

• The process of converting light energy into chemical energy

What is the name of the process that converts pyruvate into acetyl-CoA?

• Glycolysis

• Krebs cycle

• Electron transport chain

• Pyruvate oxidation

Where does the Krebs cycle occur in eukaryotic cells?

• Cytoplasm

• Mitochondrial matrix

• Outer mitochondrial membrane

• Inner mitochondrial membrane

What is the role of NADH and FADH2 in cellular respiration?

• They donate electrons to the electron transport chain

• They accept electrons from the electron transport chain

• They transfer phosphate groups to ADP to produce ATP

• They catalyze the conversion of pyruvate to acetyl-CoA

Which of the following is NOT a stage of aerobic respiration?

• Glycolysis

• Krebs cycle

• Fermentation

• Electron transport chain

What is the purpose of the electron transport chain in cellular respiration?

• To generate a proton gradient across the inner mitochondrial membrane

• To synthesize glucose from carbon dioxide and water

• To produce ATP by oxidative phosphorylation

• To convert pyruvate into acetyl-CoA