Cellular Respiration Quiz

What is the primary source of glucose in cellular respiration?

• Sunlight

• Water absorption

• Food digestion

• Photosynthesis

How many ATP molecules are net gained from glycolysis?

• Four

• Six

• Two

• Eight

Where does pyruvate oxidation occur in the cell?

• Endoplasmic reticulum

• Nucleus

• Mitochondrial matrix

• Cytosol

What is the ATP value of NADH produced in the mitochondrial matrix?

• 2.5 ATP

• 1.5 ATP

• 4 ATP

• 3 ATP

Why is NADH from the cytosol valued differently than NADH from the mitochondrial matrix?

• Higher energy content

• Active transport energy cost

• Different enzyme interaction

• Different chemical structure

How many ATP molecules are produced from FADH2 in the electron transport chain?

• 1 ATP

• 1.5 ATP

• 2 ATP

• 2.5 ATP

What is a key difference in ATP production between eukaryotic and prokaryotic cells?

• Eukaryotic cells use photosynthesis

• Prokaryotic cells do not require active transport

• Eukaryotic cells produce more ATP

• Prokaryotic cells have mitochondria

Why might the theoretical yield of 36-38 ATP not be achieved in practice?

• ATP is not used in cellular processes

• Environmental factors can affect efficiency

• Enzymes always work at full capacity

• All cells are identical

What is the significance of cellular respiration in biology?

• It is not important

• It is essential for energy production in cells

• It occurs only in plants

• It is a rare process

What is the main reason for variability in ATP production?

• Constant enzyme activity

• Environmental stress and conditions

• Lack of cellular respiration

• Uniform cellular conditions