Exploring Cellular Respiration and Energy Production

What is the primary purpose of cellular respiration?

• To create proteins

• To store fat

• To break down organic molecules and produce energy

• To produce glucose

Which stage of cellular respiration does not require oxygen?

• Citric acid cycle

• Intermediate stage

• Glycolysis

• Electron transport chain

During glycolysis, what is glucose converted into?

• Lactate

• Pyruvate

• Acetyl CoA

• Carbon dioxide

How many ATP molecules are net gained during glycolysis?

• 4

• 2

• 6

• 8

What happens to pyruvate in the intermediate stage if oxygen is available?

• It enters the citric acid cycle directly

• It is stored as fat

• It is converted to lactate

• It is converted into acetyl CoA

What is produced during the citric acid cycle from one acetyl CoA molecule?

• 1 ATP, 6 NADH, 1 FADH2, 4 CO2

• 1 ATP, 3 NADH, 1 FADH2, 2 CO2

• 2 ATP, 3 NADH, 2 FADH2, 2 CO2

• 2 ATP, 6 NADH, 2 FADH2, 4 CO2

Which stage of cellular respiration produces the most ATP?

• Electron transport chain

• Citric acid cycle

• Intermediate stage

• Glycolysis

What is the estimated total number of ATP molecules produced in cellular respiration?

• 38-40

• 28-30

• 20-22

• 32-34

Which other simple carbohydrates can enter the cellular respiration pathway during glycolysis?

• Sucrose and maltose

• Fructose and galactose

• Lactose and sucrose

• Maltose and fructose

How can triglycerides enter the cellular respiration pathway?

• Both glycerol and fatty acids enter glycolysis

• Both glycerol and fatty acids enter the citric acid cycle

• Glycerol enters the citric acid cycle, fatty acids enter glycolysis

• Glycerol enters glycolysis, fatty acids enter the citric acid cycle