5.2: Cellular Respiration (Aerobic Respiration). Plants — make food (sugar) through photosynthesis Animals and other organisms — get food by eating plants and animals. Energy Review. Cellular respiration — glucose and food are broken down to make energy (ATP) in ALL organisms - PowerPoint PPT Presentation
5.2: Cellular Respiration
5.2: Cellular Respiration(Aerobic Respiration)Plantsmake food
(sugar) through photosynthesisAnimals and other organismsget food
by eating plants and animalsEnergy Review
Cellular respiration glucose and food are broken down to make
energy (ATP) in ALL organismsOccurs in the mitochondria of
eukaryotesOccurs in the cytoplasm of prokaryotesCellular
C6H12O6 + O2 CO2 + H2O + energyCellular Respiration
EquationReactantsProductsAerobic Respiration: breaking down of
glucose molecules into smaller pieces in the presence of oxygen to
THREE STEPS OF AEROBIC RESPIRATION1. Glycolysis2. Krebs/Citric
Acid Cycle3. Electron Transport Chain (ETC)Cellular Respiration
1. Glycolysis: occurs in cytoplasm; glucose is split in half,
forming a pyruvate molecule2 ATP releasedElectrons released and
carried to mitochondria by NADHCellular Respiration
Cellular RespirationGlycolysis quizWhere does glycolysis take
What molecule is used in glycolysis?
What are the products of glycolysis?
What ultimately happens to each of these products?
Write an equation that represents glycolysis
2. Krebs/Citric Acid Cycle: occurs in the mitochondria; pyruvate
is split into smaller pieces CO2 gas released (we breathe it out)2
ATP releasedElectrons released and move to mitochondrial membrane
by NADH and FADH2Cellular Respiration
NAD+NADHNAD+Krebs/Citric Acid Cycle QuizWhere does the CAC
What molecule is used in the CAC?
What are the products of the CAC? What happens to each of these
Write an equation that represents the CACElectron Transport
Chain (ETC): made of proteins; occurs in the mitochondriaNADH &
FADH2 drop off electrons at proteinsElectrons lose energy as get
passed from protein to proteinEnergy used to make ATP (ATP
Synthase)32 ATP madeElectrons finally passed to OXYGEN to make
TOTAL ENERGY: 36 ATP from 1 glucoseCellular Respiration
ETC quizWhat is the ETC?
What molecules bring the electrons to the ETC?
What happens as the electrons get passed from protein to protein
down the ETC?
What happens to the extra energy?
What happens to the electrons at the end of the ETC?CR
Respiration(Anaerobic Respiration)Anaerobic Respiration: breaking
down glucose molecules into smaller pieces the ABSENCE of oxygen to
produce ATPCellular Respiration
TWO STEPS OF ANAEROBIC RESPIRATION1. Glycolysis: occurs in
cytoplasm; glucose is split in half, forming a pyruvate molecule2
ATP releasedElectrons released and carried to mitochondria
TWO STEPS OF ANAEROBIC RESPIRATION2. Fermentation: breaking down
pyruvate without oxygen
Lactic acid fermentation: pyruvate is broken down into lactic
acid + ATP2 ATP releasedLactic acid builds up as in muscle cells
& causes burning sensation (muscle cramping) during strenuous
C-C-C + NADH H-C-C-C + ATP + NAD+pyruvate e carrier lactic acid
energy carrierCellular Respiration
Alcoholic fermentation: pyruvate is broken down into alcohol,
carbon dioxide, and ATP in yeast and bacterial cells2 ATP
releasedUsed in making bread and alcohol beer
C-C-C + NADH C-C-OH + CO2 + ATPPyruvate + e carrier alcohol +
carbon + energy dioxideCellular Respiration
EatDigestionGlycolysisCitric acid cycleElectron transport
chainOxygen is presentNo oxygen is present Fermentation(anaerobic
respiration)Lactic acid fermentationAlcoholic fermentationIn
animalsIn yeastAerobic respirationCellular
Photosynthesis vs.Respirationfood synthesized food broken
energyChloroplastmitochondria/cytoplasmOnly autotrophs Autotrophs
and heterotrophs (all living cells)