cellular.pdf - Cellular Respiration Cellular Respiration What is Cellular Respiration \u25a0 \u25a0 Cellular respiration is the complex process of breaking

cellular.pdf - Cellular Respiration Cellular Respiration...

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=QJ]WW R\VV )NUOUO^XXUOJ[UU 8N\VVYSSR[UUJ]WWRXRWQ&% Ŷ &&&Cellular respiration is the complex process of breaking down food molecules to release energy for work° Ŷ There are two types of respiration# Ŷ )))Fermentation ±anaerobic respiration² – occurs in the absence of oxygen Ŷ $$$Aerobic Respiration – requires oxygen
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=Q\\ )NUOUO^XXUOJ[UU 8N\VVYSSR[UUJ]WWRXRWQ&% Ŷ &&&Cells carry out the reactions of cellular respiration in order to produce $$$ATP° Ŷ $$$ATP is used by the cells for energy° Ŷ $$$All organisms need energy³ therefore³ all organisms carry out cellular respiration° Ŷ The energy needed to produce $$$ATP comes from glucose° Ŷ Remember# glucose is produced in photosynthesis°
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The overall reaction for photosynthesis is# ´++H µ 2O ¶ ´&&&C2O µ → &&&C ´ ++H ·µ 2O ´ ¶ ´2O µ The overall reaction for aerobic ±oxygen¸requiring² cellular respiration is# &&&C ´ ++H ·µ 2O ´ ¶ ´2O µ → ´++H µ 2O ¶ ´&&&C2O µ ,,It is the reverse of the photosynthetic reaction° :QN 8N_YYN[UU\VVN
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-UO\\LXRUO\\\VVR\VV sugar splitting
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-UO\\LXRUO\\\VVR\VV Ŷ %%%Both cellular respiration pathways begin with glycolysis° Ŷ ***Glycolysis occurs in the &&&CYT2OS2O/L of the cell°
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Ŷ Whether or not oxygen is present³ glycolysis splits glucose into &&&C ¹ molecules known as P***G$$$A/L ±***G¹P²° P***G$$$A/L is then converted to pyruvic acid ±pyruvate²° Ŷ ***Glucose is a ST$$$A%%%B/L(((E molecule that does not break down easily° Ŷ )))For a molecule of glucose to undergo glycolysis³ a cell must first SP(((E1N'''D $$$ATP to energize the glucose molecule°
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Ŷ 1Note that µ 1N$$$A'''D++H are also produced° This molecule holds a pair of high energy electrons until they can be transferred to other molecules° Ŷ This entire process is shown in section "°µ of the text°
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-UO\\LXRUO\\\VVR\VV Ŷ View the Video
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' 8N_YYRN`ZZ XRO -UO\\LXRUO\\\VVR\VV Ŷ )))First pathway in getting energy out of food Ŷ 2One molecule of glucose is broken in half³ producing two molecules of pyruvic acid Ŷ ***Glycolysis occurs in the cytoplasm and does not require oxygen Ŷ Releases only a small amount of energy but produces $$$ATP quickly Ŷ µ $$$ATP’s are consumed in the process Ŷ º $$$ATP’s are produced Ŷ µ 1N$$$A'''D++H are also produced$ This molecule holds a pair of high energy electrons until they can be transferred to other molecules°
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9^XXVPVPJ[UU\\ XRO -UO\\LXRUO\\\VVR\VV Ŷ 1Note that glycolysis will occur with or without oxygen ±anaerobic² Ŷ ,,If there is 1N2O oxygen present³ then fermentation occurs# a° /Lactic $$$Acid b° $$$Alcoholic Ŷ ,,If oxygen is present³ then glycolysis leads to two other processes# a° .Krebs &&&Cycle b° 2Oxidative Phosphorylation Ŷ (((Electron Transport &&&Chain and &&&Chemiosmosis
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Regardless of whether or not oxygen is present³ glycolysis is followed by the breakdown of pyruvic acid ±pyruvate²°
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