5 Cell respiration and metablolism

5 Cell respiration and metablolism - Biology141...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
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.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

5 Cell respiration and metablolism - Biology141...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online