Download Ch. 4: ATP and Cellular Respiration

Ch. 8.1 & 9:
ATP and Cellular Respiration
Energy
• Stored in chemical
bonds of
compounds.
• Compounds that
store energy: ATP,
NADH and FADH2.
• When bonds are
broken, energy is
released.
ATP
• Chief energy storing molecule.
• Made of: Adenine, Ribose, Phosphates
• Used for:
– Mechanical functions
– Active transport
– Breakdown/synthesis of large molecules
• Regenerates
Sources of Energy
• Autotrophs
– can make own food
– photosynthesis
– producers
• Heterotrophs
– get food from others
– consumers
CELLULAR RESPIRATION
C6H12O6 + 6O2 --> 6CO2 + 6H2O + ATP
(energy)
• Break down sugars(glucose) to produce
energy for cell functions
• 2 forms: Aerobic (with O2)
Anaerobic (without O2)
• Reaction is opposite of Photosynthesis
AEROBIC RESPIRATION (3 steps)
• Glycolysis-- occurs in the cytoplasm.
– Releases 2 ATPs and 2 pyruvates.
• Krebs Cycle-- occurs in the mitochondria.
-uses the 2 pyruvates from glycolysis
-releases 2 ATPs, 6CO2 and many
NADH & FADH2
• Electron Transport-- in mitochondria.
– Uses the NADH & FADH2 from Krebs
– Releases 32 ATPs and 6H2O
AEROBIC RESPIRATION
Total ATP = 36
ANAEROBIC RESPIRATION
• Glycolysis-- yields 2 ATPs and 2 pyruvates
– leads to : Alcoholic Fermentation in yeast
– or Lactic Acid Fermentation in muscles
ANAEROBIC RESPIRATION