Cellular Respiration (an overview)

Connection between photosynthesis & respiration Plant Cell chloroplast mitochondria glucose ATP chloroplast mitochondria glucose ATP Plants Create glucose through photosynthesis Glucose is used to make ATP through cellular respiration

Connection between photosynthesis & respiration Glucose (from food) mitochondria ATP Glucose Animals Plants create glucose through photosynthesis Animals eat the plants Glucose is used to make ATP through cellular respiration

Cellular Respiration Who? All eukaryotic cells Glucose (C6H12O6) Kingdom Protista Kingdom Fungi Kingdom Plantae Kingdom Animalia Who? All eukaryotic cells Purpose? Convert food (such as glucose) into ATP 1 glucose = 36 ATP Exothermic reaction: reaction that releases heat

Step 1: Glycolysis Where? In cytoplasm What happens? Mitochondria P ADP ADP Glucose C6H12O6 ADP C C ATP ATP P C C En-zyme C C P P C C C ADP Where? In cytoplasm What happens? A) Glucose (from our food) is broken down by enzymes B) 2 ATP molecules released for use by the cell C) Broken pieces of glucose enter mitochondria

Step 2: Kreb’s Cycle Where? Inner mitochondria layer What happens? ATP ATP Mitochondria ADP P ADP En-zyme ATP CO2 C ADP C CO2 H+ H+ P H+ C CO2 P ATP CO2 C P H+ H+ C CO2 H+ En-zyme CO2 C ADP Where? Inner mitochondria layer What happens? A) Enzymes break apart the glucose fragments further B) 2ATP, CO2, H+ ions created C) H+ ions accumulate inside the mitochondria

Step 3: Electron Transport Chain ATP ATP ATP Mitochondria P O2 ATP ATP En-zyme ADP ADP ATP ATP O2 H+ H+ ADP P O2 P H+ P H+ O2 O2 H+ H+ ADP Where? Interior mitochondria fluid What happens? Mitochondria takes in oxygen (aerobic) Enzymes bring H+ ions, O2, ADP, P together ATP created (32 total)

Quiz Which molecule is the energy molecule of cells? Which types of organisms perform cellular respiration? Where does glycolysis occur? What is broken down during glycolysis? What is created as a result of glycolysis? Where is aerobic respiration performed? Name the 2 stages of respiration that take place in the mitochondria. Which waste gas is created by the Kreb’s cycle? How many ATP molecules are made during glycolysis? Kreb’s cycle? Electron transport chain? In total?