7.5 PATHWAY 3: CELLULAR RESPIRATION (AEROBIC)

What is the third energy system that comes into prominence for sustaining intense activity longer than 90 seconds?

• Krebs cycle

• Anaerobic system

• Glycolysis

• Cellular respiration

Which energy sources can be used in addition to glucose during cellular respiration?

• Protein and water

• Protein and glucose

• Fats and protein

• Fats and oxygen

How many molecules of ATP are produced for every molecule of glucose in the aerobic system?

• 10

• 30

• 20

• 40

What is the main by-product of the electron transport chain in cellular respiration?

• Lactic acid

• Carbon monoxide

• Glucose

• Water

Which stage of cellular respiration involves the complete breakdown of glucose?

• Electron transport chain

• Krebs cycle

• Anaerobic system

• Glycolysis

Who described the processes involved in the Krebs cycle in 1937?

• Hans Adolf Krebs

• Louis Pasteur

• Marie Curie

• Albert Einstein

What is the final electron acceptor in the electron transport chain?

• Carbon dioxide

• Lactic acid

• Water

• Oxygen

How many ATP molecules are produced at the end of the Krebs cycle?

• 1

• 2

• 3

• 4

What is the main pathway for the metabolism of fats and proteins in cellular respiration?

• Anaerobic system

• Glycolysis

• Krebs cycle

• Electron transport chain

What is the primary function of the mitochondria in cellular respiration?

• Waste elimination

• Cell division

• Energy production

• Protein synthesis