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Biology 101

by: Gary Williams

Biology 101 BIO 101

Gary Williams
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About this Document

This notes cover the Introduction to metabolism
Principles of Biology
Mihaly Czako
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This 2 page Class Notes was uploaded by Gary Williams on Sunday October 9, 2016. The Class Notes belongs to BIO 101 at University of South Carolina taught by Mihaly Czako in Fall 2016. Since its upload, it has received 4 views.


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Date Created: 10/09/16
Introduction to Metabolism Metabolism- Totality of an organism’s chemical reaction. A metabolic pathway begins with specific molecules that undergo a series of defined steps and eventually ends up as a certain product. There are 2 types of metabolic pathways; i. Catabolic pathways, a metabolic pathway that releases energy by breaking down complex molecules to simpler compounds. ii. Anabolic pathways, they consume energy to build complicated molecules from simple. It is also called a biosynthetic pathway. Energy- The capacity to cause change Types of energy; Kinetic energy, this is the relative motion of object Thermal energy; this is kinetic energy associated with the random movement of atoms or molecules. Thermal energy in transfer from one object to another is called heat. Potential energy is energy that is not moving, one that is not kinetic energy. Matter possesses this energy because of its structure or location. Chemical energy is a form of potential energy that is available for release during chemical reactions. Organisms are energy transformers. Laws of Energy Transformation Thermodynamics is the study of energy transformation that occur in a collection of matter There are 2 laws of thermodynamics. 1 law – energy can be transferred and transformed, but cannot be created or destroyed. *Principle of conversion of energy. nd 2 law – every energy transfer/transformation increases the entropy of the universe. Entropy is a measure of disorder or randomness. N/B: A spontaneous process is one that, by itself, leads an increase in entropy, the process can proceed without an increase an input of energy.


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