DOC PREVIEW
UT Arlington BIOL BIOL 3427 - Overview of glucose oxidation
Type Lecture Note
Pages 4

This preview shows page 1 out of 4 pages.

Save
View full document
View full document
Premium Document
Do you want full access? Go Premium and unlock all 4 pages.
Access to all documents
Download any document
Ad free experience
Premium Document
Do you want full access? Go Premium and unlock all 4 pages.
Access to all documents
Download any document
Ad free experience

Unformatted text preview:

BIOL 3427 1st Edition Lecture 8Outline of Last Lecture I. Growth ringsII. Overview of glucose oxidationa. Aerobic pathwaysb. Anaerobic PathwaysCurrent LectureI. Growth Ringsa. Produced by periodic activity of vascular cambiumb. In secondary xylem (And secondary phloem)c. Visibilityi. Early wood less dense wider cells, thinner walls compared to late woodII. Annual Ringsa. Growth ring represents one seasonIII. False Annual ringsa. Change in water availability/environment produces more than one growth ring a yearIV. Sapwooda. Light colored conductive woodV. Heartwooda. Dark, nonconductive wood filled with oils, gums, resins, tannins (center ofthe stem)VI. Overview of Glucose oxidationa. Breakdown of carbohydrates to generate energy to power the celli. Starch or sucrose must be broken down to sucrose firstii. ATP is producedb. Glucose loses electrons (And its H+ ions)c. Oxygen gains electrons (Reduced)d. C6H12O6 +6O2 6CO2 +6H2O +Energye. Does glucose oxidation require oxygen?i. Noii. Both Aerobic (more efficient) and nonaerobic pathway existsf. Four Stagesi. Glycolysisii. Citric Acid Cycleiii. Electron Transport ChainThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.iv. Oxidative phosphorylationg. Energy converted to?i. ATPii. HeatVII. Glycolysisa. Ten steps, each catalyzed by specific enzymeb. Requires oxygen?i. Noii. Occurs in almost all living cells (cytosol)iii. Primitive process-occurred before O2 wasc. Yields two ATP, 2 pyruvate in atm; 2 NADHVIII. Aerobic Pathwaya. Key role of pyruvatei. If O2 is present, oxidized completely to CO2ii. If not, aerobic pathway less efficientb. Mitochondrial structurei. Cristae1. Citric acid cycle enzymes, ETC components2. Matrixa. Watery fluid in membranei. Other citric acid cycle enzymesIX. Aerobic Pathwaya. Pyruvate enters matrixi. Then oxidized, and de-carboxylated (CO2 splits off)ii. NADH produced (electron carrier) b. Coenzyme Ai. Temporarily attached to acetyl group to become acetyl coAc. Citric acid cycle (aka Krebs Cycle)i. Begins with Acetyl co-Aii. Many intermediate stepsiii. Acetyl CoA completely oxidized to CO2 (to oxaloacetate reenterscycle)iv. Produces NADH, FADH2, + ATPd. Electron transport chaini. High energy electrons of NADH and FADH2 pass along chain ofelectron carriersii. Energy level of electrons decreases from carrier to carrieriii. Electrons finally pass from O2 to form wateriv. Released energy used to generate a proton gradiente. Oxidative phosphorylationi. AP Synthase1. Large enzyme complex in inner membrane with a protonchannelii. Chemiosmotic coupling1. Potential energy of protons moving down theirelectrochemical gradient used to produce ATPX. Aerobic Pathways: Balance sheet for ATP yield from 1 glucosea. Anaerobic pathwaysi. Only two ATP produced in glycolysis yielded in anerobic respiration (+pyruvate)b. Lactate fermentationi. Produces lactateii. Bacteria, fungi, protists, animalsc. Alcohol fermentationi. Produces ethanol and CO2ii. Yeast and plantsPhotosynthesis Light and lifeXI. Role of light pigmentsa. 3CO2 +6H2O C2H6O3 +3O2 +3H2Ob. Light energy must be absorbed: Glucose is the more immediate product ofphotosynthesisi. Pigment1. Reflects or transmits wavelengths they do not absorbii. Electrons boosted to excited state1. Fluorescence: energy released as heat or photon2. Resonance energy transfer: energy transferring to neighboringchlorophylls3. High energy electron transferred to electron receptoriii. Chlorophyll1. Embedded in thylakoids of chloroplast2. Absorbs violet and blue wavelengths as well as red3. Reflects greeniv. Chlorophyll types:1. Chlorophyll aa. Essential: main photosynthetic pigmentb. In all photosynthetic eukaryotes and cyanobacteria2. Chlorophyll Ba. In plants, euglenoids, and green algae3. Chlorophyll Ca. Replaces 1a in brown algae and diatomsv. Accessory pigment1. Broadens range of light absorption; energy transferred tochlorophyll avi. Carotenoids1. Accessory pigments2. Red, Orange, yellow lipid soluble pigment3. In all chloroplasts and cyanobacteria4. Embedded in thylakoid membranes5. Anti-oxidant properties protect chlorophyll from oxidativedamage by light6. Groupsa. Caretenoidsb. Xanthophyllsvii. Phycobilins1. Accessory pigments2. In cyanobacteria and chloroplasts of red algae3.


View Full Document
Download Overview of glucose oxidation
Our administrator received your request to download this document. We will send you the file to your email shortly.
Loading Unlocking...
Login

Join to view Overview of glucose oxidation and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Overview of glucose oxidation 2 2 and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?