A-level Biology Respiration with video

What are the four key stages of cellular respiration discussed in the video?

• Glycolysis, Link Reaction, Krebs Cycle, Oxidative Phosphorylation

• Photosynthesis, Fermentation, Krebs Cycle, Glycolysis

• Fermentation, Oxidative Phosphorylation, Lactic Acid Cycle, Glycolysis

• Glycolysis, Calvin Cycle, Citric Acid Cycle, Electron Transport Chain

Where does glycolysis occur within the cell?

• Nucleus

• Endoplasmic reticulum

• Cytoplasm

• Mitochondrial matrix

How many ATP molecules are net produced by glycolysis from one glucose molecule?

• 2 ATP

• 4 ATP

• 36 ATP

• 34 ATP

What is the end product of the link reaction that enters the Krebs cycle?

• Lactate

• Pyruvate

• Acetyl CoA

• Glucose

During the Krebs cycle, how many molecules of carbon dioxide are produced per glucose molecule?

• Two

• Four

• Six

• Eight

How many ATP molecules are produced in oxidative phosphorylation from one glucose molecule?

• 4 ATP

• 34 ATP

• 36 ATP

• 2 ATP

What is the primary role of oxygen in oxidative phosphorylation?

• To act as the final electron acceptor

• To produce carbon dioxide

• To phosphorylate ADP into ATP

• To split glucose into pyruvate

In anaerobic respiration within muscle cells, pyruvate is converted into what?

• Lactate

• Acetyl CoA

• Ethanol

• Carbon dioxide

What is the significance of NAD being re-oxidized in anaerobic respiration?

• It helps in the direct production of ATP.

• It is necessary for the production of lactate only.

• It enables glycolysis to continue producing ATP.

• It allows the Krebs cycle to continue without oxygen.

What is produced during anaerobic respiration in yeast cells?

• Ethanol and carbon dioxide

• Lactate

• Oxygen

• Water