Cell respiration

First step in aerobic cell respiration:

• glycolysis

• Krebs cycle

• ethanoic fermentation

• electron transport chain

Site of Krebs cycle:

• cytoplasm

• mitochondrial matrix

• inner membrane of mitochondrion

Products of aerobic cell respiration

• CO₂ and H₂O

• CO₂ and ethanol

• lactate

• ATP only

Product of glycolysis

• pyruvate

• CO₂ and H₂O

• ATP

• lactate or ethanol

Between glycolysis and Krebs cycle

• link reaction

• electron transport chain

• lactic fermentation

• ethanoic fermentation

Accept H and electrons released from glucose or pyruvate

• NAD+

• FAD

• NADH

• FADH

How many O₂ molecules are needed to respire 1 molecule of glucose?

• 1

• 2

• 12

• 6

It transports 2C molecule from link reaction to Krebs cycle:

• pyruvate

• NADH

• CoA

• FADH

Site of accumulation of H released from NADH and FADH:

• mitochondrial matrix

• cytoplasm

• intermembrane space in mitochondria

• vacuoles

How many molecules of ATP are produced per glucose in electron transport chain?

• 2

• 4

• 16

• 32