KEY CONCEPT The overall process of cellular respiration converts sugar (glucose) into ATP (energy) using oxygen.

Cellular respiration is aerobic, or requires oxygen. Cellular respiration makes ATP by breaking down sugars (that we consume and plants produce). Cellular respiration is aerobic, or requires oxygen. Aerobic stages take place in mitochondria-happens in both animal and plant cells. mitochondrion animal cell

Glycolysis must take place first. anaerobic process (does not require oxygen) takes place in cytoplasm splits glucose into pyruvic acid (or pyruvate) Glucose has 6 C’s and pyruvic acid is two 3 C’s produces two ATP molecules = pyruvate

Cellular respiration is like a mirror image of photosynthesis. The Krebs cycle transfers energy to an electron transport chain. takes place in mitochondrial matrix breaks down pyruvic acid from glycolysis 6H O 2 6CO 6O mitochondrion matrix (area enclosed by inner membrane) inner membrane ATP energy energy from glycolysis 1 4 3 and Krebs Cycle makes a small amount of ATP releases carbon dioxide transfers energy-carrying molecules

energy from glycolysis 1. Glycolysis: breaks glucose into pyruvate which is 2, 3-carbon molecules-makes 2 ATP 6H2 O 6CO 2 6O mitochondrion Takes place in matrix inner membrane 2 ATP ATP energy energy from glycolysis 1 4 3 and 3. Krebs cycle 4. 2. pyruvate 5. Energy transferred= NADH & FADH2 6. 7.

energy from glycolysis The electron transport chain produces a large amount of ATP. takes place in inner membrane energy transferred to electron transport chain oxygen enters process ATP produced 6H O 2 6CO 6O mitochondrion matrix (area enclosed by inner membrane) inner membrane ATP energy energy from glycolysis 1 4 3 and Electron Transport water released as a waste product

The equation for the overall process is: C6H12O6 + 6O2  6CO2 + 6H2O + ATP The reactants in photosynthesis are the same as the products of cellular respiration.