The process of producing the energy needed for metabolic reactions Cellular Respiration The process of producing the energy needed for metabolic reactions Amoeba Sisters https://www.youtube.com/watch?v=4Eo7JtRA7lg

What is Cellular Respiration? TYPE 1: Anaerobic – No oxygen used to make ATP TYPE 2: Aerobic - Oxygen used to make ATP

C6H12O6 + O2  H2O + CO2 + ATP Chemical Formula: Glucose Oxygen Water Carbon Dioxide Energy

Occurs in the Cytoplasm Aerobic Respiration STEP 1: GLYCOLYSIS “Glucose Splitting” - A molecule of Glucose is split into 2 pyruvate molecules. 2 ATP are produced Occurs in the Cytoplasm

STEP 2: Kreb’s Cycle (Citric Acid Cycle) A series of chemical reactions where CO2 is produced. 2 ATP are produced Occurs in the Mitochondria

STEP 3: ELECTRON TRANSPORT CHAIN Electrons from Steps 1 & 2 move down a chain towards a molecule of Oxygen and form water molecules. Oxygen = Final Electron Acceptor 32-34 ATP are produced Occurs in the Mitochondria

The Big Picture

Summary 36 ATP produced per glucose molecule 2 in Glycolysis 2 in Kreb’s Cycle 32-34 via Electron Transport Chain Carbon Dioxide and Water are waste products of cellular respiration. Oxygen = Final Electron Acceptor

TYPE 1: Anaerobic Respiration Fermentation Cellular Respiration without the use of oxygen. Occurs in the cytoplasm Why? To make ATP for metabolic reactions. To continue glycolysis (no oxygen needed)

Type 1: Lactic Acid fermentation Performed by: Animals & Bacteria Step 1: Glycolysis Glucose  Pyruvate Step 2: Pyruvate Lactic Acid Lactic Acid builds up in muscle cells  causes sore and weak muscles Waste product

Type 2: Alcoholic Fermentation Performed by: Yeast & Bacteria Step 1: Glycolysis Glucose  Pyruvate Step 2: Pyruvate  Ethanol + CO2 Ethanol = Type of Alcohol Ethanol & CO2 are waste products Used to make bread, beer, & wine