2 “Stop and Think” pg. 340What variable or variables affected the volume in your test tube? Provide evidence for your answer using that your team and other teams collected.Yeast needs a source of food in the form of chemical energy for cellular respiration. What do you think was the source of chemical energy in the investigation?Anacharis gave of the same gas in Part I Cellular Activities in Plant as the gas that was in the test tube. Where do you think the gas came from? Use what you know about the law of conservation of matter. Write your ideas down in your notebook.
3 “Stop and Think” pg. 340Yeast was the variable that affected the volume of gasSugar was the source of chemical energy in the investigationGas did not come from the air, right?So where did it come from?The gas came from the molecules that must have been in the yeast and Anacharis.
5 Cellular Respiration Occurs in the cytosol and the mitochondria Cytosol: jelly like substance in the cytoplasmMitochondria: ?Mitochondria"cellular power house“, they generate most of the cell's supply of (ATP), used as a source of chemical energy
6 We have the where but what is cellular respiration? Occurs within all living things plants and animalsIs essential for survivalIs the process of breaking down glucose for energyWait didn’t we just make glucose in photosynthesis?All that work we did and now we are going to break it down?Yup!6 CO2 + 6 H2O C6H12O6 + 6 O2Look Familiar?Photosynthesis equation.C6H12O6 + 6 O2 6 CO2 + 6 H2O + ATPWHOA! Mind blown?Cellular Respiration Equation
7 Can occur with or without oxygen Aerobic Respiration: Cellular respiration with oxygenThree Stages:Each stage involves a series of chemical reactions to produce ATP for energyStages include:GlycolysisKrebs CycleElectronTransport Chain
8 Glycolysis INPUT First stage aerobic respiration Occurs Cytosol Glucose: two molecules of pyruvateGlucoseBegin 6-Carbon SugarTwo ATP molecules transfer a phosphate to glucoseGlucose: two molecules containing 3 carbonsRearrangement of Carbon atoms: pyruvate. ATP and NADH are producedTwo molecules of pyruvate formedPyruvate: carbon molecule found at the end product of glycolysisPyruvateOUTPUTDiagram modified by: Tiffany Adams
9 Krebs Cycle In Mitochondria CO2NAD+NADHCPyruvateADP2ATPINPUT2 molecules of pyruvate enter the mitochondriaEach pyruvate is converted to a two-carbon moleculeEnzymes release CO2 from pyruvateNADH & ATP producedTwo more ATP moleculesKrebs CycleOUTPUTCreated by Tiffany Adams based on textbook Figure 7.11 page 324. BSCS Science: An Inquiry Approach. Colorado: Kendall Hunt, 2006
10 Electron Transport Chain Uses the NADH from previous stages (INPUT)NADH molecules carry the H atomsH separated: electrons & protonsElectrons move from carrier to the next they release EnergyProtons are pumped across the membrane (concentration gradient)this drives ATP production as protons DIFFUSE back to the mitochondriaProtons diffuse are pumped thru ATP synthase (creating the most ATP) (OUTPUT)End: electrons and protons join with O2 to form H2O (OUTPUT)
11 Anaerobic Respiration Anaerobic respiration: oxygen NOT requiredGlucose: pyruvate and small amount of ATPATP production ends glycolysisPyruvate is converted into other molecules (fermentation)Anaerobic RespirationAerobic RespirationFermentation/Lactate Net ATP =2Citric acid cycle= Krebs cycleNet ATP=36
13 Biosynthesis ATP provides energy for biosynthesis reactions in cells Biosynthesis reactions form larger, more complex molecules from less-complex moleculesSuch as the formation of starch from glucoseBiosynthesis helps organisms to grow and maintain their structureDefinition provided by definition bing.combiological production of chemical substances: the synthesis of chemical substances as the result of biological activity
14 “Stop and Think” pg. 344 Where does cellular respiration take place? Why do you think it is important that plants contain mitochondria?What evidence do you have that cellular respiration occurs in plant cells? Think back to your investigation of Anacharis. What gases did the plant exchange?How is combustion similar to respiration? Recall that you learned about combustion of methane in the Matter Is Marvelous Unit. The reactions are shown here.Compare aerobic and anaerobic respiration use a T-table or Venn diagram to list any similarities and differences between them.Combustion CH4 + 2 O CO2 + H2O + heatCellular Respiration C6H12 + 6O CO2 + 6H2O + ATP
15 “Stop and Think” pg. 344 Inside the cells Because it is where the cellular respiration takes place in plant cells as well as yeast and animal cellsWhen we saw a decrease in pH with the Anacharis. This indicates that the Anacharis can five off carbon dioxide, which is a product of cellular respirationCombustion and cellular respiration both give off carbon dioxide, water, and energy. Combustion the energy is heat and in Cellular respiration the energy is ATP
16 5. Compare aerobic and anaerobic respiration use a T-table or Venn diagram to list any similarities and differences between them.
17 “Reflect and Connect” pg. 345 What functions are ATP molecules used for?What role does glucose play in cellular respiration?Create a concept map of the process of cellular respiration using the following words and any other words you would like to add. Remember to use verbs to connect the concepts to show relationships. Arrange the concept map so that the most universal concept is at the top.Cellular RespirationWaterCarbon DioxideATPWhy is cellular respiration important to all living things, including plants?What do you think the relationship is between photosynthesis and cellular respiration? Keep in mind how the reactants, products, and energy in these processes might be related the generalized equations are shown hereOxygenBiosynthesis reactionsGlucosePhotosynthesis: CO2 + 6 H2O C6H12O6 + 6 O2Cellular Respiration: C6H12O6 + 6 O2 6 CO2 + 6 H2O + ATP
18 “Reflect and Connect” pg. 345 ATP molecules are needed for basic cell functions such as active transport across membranes and biosynthesis molecules.Glucose provides the energy that is converted to ATP during cellular respirationConcept map on next slideCellular respiration is important for all living things because it provides energy in the form of ATP that is necessary to carry out basic cellular processes.You provide me the answers.
19 3. Concept Map Cellular Respiration Is used in Glucose O2 Glycolysis H2OATPBiosynthesis reactionsGives offKrebs CycleElectron TransportincludesAnaerobic respirationWithout O2With O2INPUTSOUTPUTS