Ch. 9 Cellular Respiration and Fermentation (Exam 2).docx

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Department
Biology
Course
BIOL 110
Professor
D R.J O H N P E L E S
Semester
Fall

Description
Biology 110 Dr. Peles Date: / / . Cellular Respiration and Fermentation: Chapter 9 I. Catabolic Pathways A. Glycolysis Cellular Respiration- Process by which cells obtain energy from B. Aerobic Respiration organic molecules (O₂); energy is released and CO₂ is produced C. Fermentation II. Oxidation-Reduction Reaction becomes oxidized (loses electron) becomes reduced (gains electron) III. Electron Carriers A. NADH 1. NAD (Nicotamide Adenine Dinucleotide) i. NAD⁺ + H → NADH B. FADH₂ 1. FAD (Flavin Adenine Dinucleotide) i. FAD + 2H → FADH₂ 2 – + 2+H 2 – + + H+ Dehydrogenase NADH Reduction +f NAD NAD+ + 2[H] + H+ Oxidation of NADH Nicotinamide (reduced form) (oxidized form) Overview of Cellular Respiration IV. Overview of Cellular Respiration Electrons Electrons carried A. Chemical Equation for Cellular carried via NADH2and via NADH FADH Respiration: ~ 1 ~ Biology 110 Dr. Peles Date: / / . 1. Organic compound + O₂ → CO₂ + ATP + H₂O + Oxidative Glycolysis phosphorylation: Glucose Pyruvate electron transport Substrate-Level andcycle chemiosmosis Phosphorylation Heat Cytosol Mitochondrion Enzyme Enzyme ADP ATP ATP ATP P B. Substrate-level Substrate-level Oxidative Stages ATP phosphorylation phosphorylation phosphorylation of Cellular Respiration 1. Glycolysis i. Location: Cytoplasm ii. Oxygen required? No iii. One molecule of 6-carbon glucose → two molecules of 3-carbon pyruvate iv. Net gain from one glucose: a. Two ATP by substrate level phosphorylation b. Two NADH that enter oxidative phosphorylation c. Two pyruvate molecules v. Summary: Ten enzyme catalyzed reactions; breaks glucose (6- carbon chain) into two pyruvates (3- carbon chain); produces a net of two Glycolysis ATP
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