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Botany 1 Week 2 notes

by: Sophie Menos

Botany 1 Week 2 notes PLSC101010

Sophie Menos

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About this Document

9/6/16 9/8/16 These notes cover what will be on the next quiz
Botany I
Class Notes
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This 6 page Class Notes was uploaded by Sophie Menos on Friday September 9, 2016. The Class Notes belongs to PLSC101010 at University of Delaware taught by Bais,Harsh in Fall 2016. Since its upload, it has received 18 views. For similar materials see Botany I in Plant Science at University of Delaware.


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Date Created: 09/09/16
Respiration Review 9/8/16 A. CH 5 Review… • Respiration o In all living organisms o glucose + oxygen (yields) 6 molecules of carbon dioxide + 6 molecules water + ATP o 36 ATP/glucose molecule • 3 parts o glycolysis § in cytoplasm o krebs cycle § in mito matix o ETC § in mito inner membrane • Breakdown o glycolysis § glucose (yields) 2 pyruvate + 2 water molecules + energy (2 NADH + 2 ATP) § first product of respiration: 2 molecules of water § called investment because need 2 ATP to breakdown glucose o between glycolysis and krebs cycle § 2 pyruvate (yields) 2 acetyl CoA (C2) + 2 molecules of carbon dioxide + energy (2 NADH) § second product of respiration 2 molecules of carbon dioxide o Krebs cycle § 2 acetyl CoA (C2) (yields) 4 molecules of carbon dioxide + energy (6 NADH + 2 FADH2) § third product of respiration last 4 molecules of carbon dioxide o ETC § point is to balance protons and electrons § 10 NADH (yields) 30 ATP 2FADH (yields) 4 ATP § total ATP = 30 + 4 + 2 +2 = 38 § 36 – 2 (from energy used to move pyruvate to mito) = 36 • hold central role in cell metabolism • environmental factors o oxygen vag o light Respiration Review 9/8/16 § lower respiration in shade o temperature § higher temperature = higher respiration Chapter 5,6 9/6/16 8:19 PM Respiration respiration • mitochondria – site of respiration • sugar + oxygen (yields) carbon dioxide + water + energy o burn glucose yields CO2 H2O and ATP • C6H2O6 + 6O2 (yields) 6CO2 + 6H2O + energy (ATP and heat) • holds central role in cell metabolism o provides energy and c-metabolites for synthesis of other molecules • 3 phases o glycolysis o citric acid cycle o electron transport chain • oxygen in and carbon dioxide out (cellular breathing) flow of energy • heat flows from hot to cold • solute particles flow from region of high concentration to low concentration Uses of ATP • transport work o solute transport • mechanical work o motor protein moving • chemical work o reactants making products oxidation and reduction • oxidation: loses electron • reduction: gains electron • OIL RIG o oxidation is losing reduction is gaining electron carriers example • oxidized state o NAD+ • reduced state o NADH 3 phases of respiration • glycolysis o occurs in cytoplasm o breaking down glucose into two C3 molecules (pyruvate) o generate ATP (substrate-level phosphorylation) o C6 (yields) 2 pyruvate + 2H2O + 2NADH + 2ATP • Krebs/citric acid cycle o matrix in mitochondria o NAD+ + 2H+ + 2e- (from C2) (yields) NADH + H+ § 2C3 (yields) 6CO2 § pyruvate makes 6 molecules of carbon dioxide o generates ATP (substrate-level phosphorylation) o making citric acid • electron transport chain o inner membrane in mitochondria o NADH and FADH2 used to make ATP (oxidative phosphorylation) o NADH (yields) NAD+ + 2e- +2 H+ o electrons carried from electron acceptor 1 to 2 to 3 o whole point is to balance electrons § if not… ú highly acidic environment ú imbalanced environment TOTAL ATP GENEERATED IS 38/glucose molecule net gain is 36/glucose molecule because lose 2 ATP when moving from cytoplasm into mitochondria cellular respiration efficiency is 38.3% what is important is 3 phases, how many carbon in each phase, and equations from each phase environmental factors • temperature o higher = higher respiration rate • oxygen • light o lower respiration rate in shady leaves/plants Simplistic steps • glycolysis o cytoplasm o glucose goes in o split to 2 pyruvate • krebs cycle o mitochondria matrix o pyruvate goes in becomes C2 o NADH and FADH2 • electron transfer chain o mitochondria inner membrane o NADH moves from accepter 1-2-3 o point is to balance protons and neutrons § in doing so make ATP


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