2. Sugar or Energy?
1.
4.
2.
3.
• Carbohydrates
• Proteins
• Compound containing carbon, hydrogen, and
oxygen
• Stores energy
• Compounds containing
carbons, hydrogen, oxygen, and nitrogen
• High energy electron carrier
• Supplies energy
4. Energy
ATP
NADH
NAD+
Adenosine Triphosphate
• Protein
• Compound containing carbon,
oxygen, hydrogen, and nitrogen
• Supplies energy
• Protein
• Compound containing
carbon, oxygen,
hydrogen, and nitrogen
• High energy electron
carrier
• Supplies energy
5. Cellular Respiration Overview
• Equation – C6H12O6 + 6 O2 6 CO2 + 6 H2O
• Cellular Respiration is defined as the aerobic
harvesting of energy from food molecules
• Occurs in three stages
1. Glycolysis 2. Citric Acid Cycle
3. Electron Transport Chain
6. Glycolysis
• Glycolysis means “splitting sugar”
• Starts with a 6 Carbon sugar
• 2 ATP’s are used too activate the sugar which
then splits into two 3-carbon compounds
7. Glycolysis cont…
• Once there are two 3-carbon sugars, two
NAD+ molecules become reduced, producing a
net gain of 2 ATP
• End product is two pyruvate molecules, which
are essential in beginning the next stage of
cellular respiration (Citric Acid Cycle)
• If the pyruvate do not continue cellular
respiration, they will start fermentation
