5 Cell respiration and metablolism

5 Cell respiration and metablolism - Biology141(Physiology...

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4/6/08 1:00 AM Biology141 (Physiology) Page 1 of 4 https://courses.bio.psu.edu/spring2008/biol141/Lecture%205(2008).htm Biology141 (Physiology) Lecture 5 M. Whim CELL RESPIRATION AND METABOLISM The sorts of questions we will try to answer in this and the following lecture are: after eating a meal how is energy extracted? how is the extracted energy stored? how does the body adapt to a change in energy requirements? [1]. BACKGROUND / RECAP. catabolic reactions release energy (often from the breakdown of large, complex organic molecules). this involves oxidation-reduction reactions. the energy in large organic molecules is eventually used to make ATP. energy is extracted from organic molecules in many small steps. NAD and FAD are coenzymes that transport hydrogen atoms from one enzyme to another. [2]. GLYCOLYSIS. glycolysis is the first part of the metabolic pathway responsible for the breakdown of glucose. where does it occur? basically the reaction is: Glucose + 2 NAD + 2 ADP + 2 Pi 2 Pyruvic acid + 2 NAHD + 2 ATP C 6 H 12 O 6 C 3 H 4 O 3 note that it is a NET gain of 2 ATP’s and 2 NADH molecules in glycolysis . each small step is controlled by an enzyme and some energy is transferred to ATP, the rest is released as heat. in the early stages of glycolysis, 2 phosphate groups are added to glucose.
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This note was uploaded on 04/05/2008 for the course BIOL 141 taught by Professor Viti,janehartwel during the Spring '08 term at Penn State.

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5 Cell respiration and metablolism - Biology141(Physiology...

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