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UA - BIOS 108 - Class Notes - Week 4

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UA - BIOS 108 - Class Notes - Week 4

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background image A form of potential energy i. Chemical energy  a. It CANNOT be created or destroyed i. This is the conservation of energy principle and the 1st Law of Thermodynamics. ii. Energy can be changed from one form to another b. Is a type of kinetic energy that is a product of all energy conversions i. Heat c. A measure of disorder, or randomness i. All energy conversions increase the entropy of the universe ii. Entropy d. A calorie is the amount of energy that raises the temperature of one gram of water by one 
degree Celsius.
i. Not practical for measuring the energy in food 1) calories are very small units of energy ii. 1,000 calories. 1) A food calorie (Capitol C) is actually a kilocalorie iii. Store the most potential energy Have the most calories Make the most ATP Foods with the most C-H bonds Calories in Food iv. Food Calories e. The energy-releasing chemical breakdown of fuel molecules i. Provides energy for the cell to do work. ii. The chemical bonds in foods are broken down. 1) ATP is the energy currency in all cells About 40% of the energy in foods is transferred to ATP The remainder becomes heat and is lost The energy in those bonds is shifted to the bonds in ATP  2) A series of energy transferring chemical reactions iii. Cellular respiration f. Motor proteins perform mechanical work 1) Transport proteins 2) Chemical reactants  3) Examples of how ATP transfers energy to become ADP i. ATP g. The ATP Cycle h. Metabolism is the sum total of all chemical reactions that occur in organisms i. Few metabolic reactions occur without the assistance of enzymes ii. Lower the activation energy for chemical reactions iii. It catalyzes specific reactions 1) Each enzyme is very selective iv. Each enzyme recognizes a specific substrate  v. Enzymes i. Basic concepts 1. ATP= Adenosine Triphosphate
ADP= Adenosine Diphosphate
Chapter 5- The Working Cell Wednesday, September 14, 2016 10:27 AM     BSC 108 Page 1    
background image ATP= Adenosine Triphosphate
ADP= Adenosine Diphosphate
    BSC 108 Page 2    

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School: University of Alabama - Tuscaloosa
Department: Anatomy and Physiology
Course: Intro to Biology for Non-Majors
Professor: Yates
Term: Fall 2016
Tags: Biology
Name: BSC 108 Week 4 notes
Description: These notes cover Chapter 5- The working cell.
Uploaded: 09/19/2016
6 Pages 14 Views 11 Unlocks
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