Recognize that organisms have several ways to obtain energy.

• Describe the differences between autotrophs and heterotrophs.
• List the sources of energy used by chemosynthetic and photosynthetic organisms.

Understand the process of aerobic cellular respiration.

• Explain the role of oxygen in aerobic respiration.
• Describe the reactants and products of glycolysis, the Krebs cycle, and the electron-transport system.
• Explain the role of NAD + and FAD in cellular respiration.

Understand the process of anaerobic cellular respiration.

• Compare the biochemical pathways utilized and the energy yield of aerobic and anaerobic cellular respiration.
• Describe two variations of anaerobic respiration.

Recognize the role of glycolysis and the Krebs cycle in fat and protein respiration.

• List subunits from fats and proteins that are metabolized by aerobic respiration.
• Describe how energy is derived from fats and proteins.