heterotrophy- a look into cellular respiration
Post on 03-Jan-2016
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DESCRIPTIONHeterotrophy- a look into Cellular Respiration. All organisms need a s ource of energy and a source of Carbon!. What is a heterotroph ?. An organism that needs to CONSUME something for food/energy. What substance is required for cellular respiration to occur?. Glucose. - PowerPoint PPT Presentation
Heterotrophy- a look into Cellular Respiration
Heterotrophy- a look into Cellular RespirationAll organisms need a source of energy and a source of Carbon!What is a heterotroph?An organism that needs to CONSUME something for food/energyWhat substance is required for cellular respiration to occur?GlucoseWhere does glucose come from?PhotosynthesisSooooIn order for a heterotroph to obtain energy, plants must undergo photosynthesis, producing glucose for use in cellular respiration.Lets Look at the Big Picture
Cellular respiration produces ATP. What molecule do you think is needed for cellular RESPIRATION to occur?
UmmmmOxygen?But WAIT! What if theres no oxygen present???
Hello. My name is Saccharomyces cerevisae! My friends call me Yeastanaerobic cellular respiration.NO Oxygen is present!
Step 1: Glycolysis- occurs in the cytoplasm of the cell
Glyco = sugarLysis = splitGlycolysis =The splitting of Glucose
Lets look at that again!Step 2: Fermentation
ONLY occurs if Oxygen is not present, causing the pyruvates to stay in the cytoplasm and ferment, or rearranges it intoLactic acid
Thats me!And me!And me!LACTIC ACID
Or Ethyl Alcohol and CO2
Hola! Its me againThis is call ANAEROBIC cellular respiration, or just Fermentation, for short.Got it? Lets see what this looks like!
I love Oxygen.BUT WHAT IF OXYGEN IS PRESENT???
Whoo hoo! We get to practice AEROBIC Cellular Respiration!
which is WAY more efficient!...Lets learn more !!!Step 1: GlycolysisRemember?
The function of the Krebs Cycle- to further the breakdown of the products of glycolysis- releasing CO2 and creating ATP. NAD+ and FAD+ are reduced to create NADH and FADH2, these molecules are used during the next stage
http://www.bio.miami.edu/~cmallery/150/makeatp/pyraerobic.jpgStep 2: The pyruvates enter the mitochondrial matrix, and participate in the Krebs CycleStep 3: The Electron Transport System (a.k.a. Oxidative Phosphorylation)Oxidative Phosphorylation occurs on the inner mitochondrial membraneNADH and FADH2 (from the Krebs Cycle) are oxidized, releasing H+ that are pumped across the membrane and create ATPand LOTS of it!
Lets see what that looks like!