BIOL 1001Feb24

BIOL 1001Feb24 - BIOL 1001 Feb.24 QUIZ: why is it possible...

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BIOL 1001 Feb.24 QUIZ: why is it possible for living organisms to comply with the 2 nd law of thermodynamics? a. Chem. rxns inside cells always cause an increase of high- level energy b. Living organisms are isolated systems and aren’t subject to the laws of physics c. The sun Is the ultimate source of energy for most forms of life on earth d. Living organisms are unique because they don’t require energy for survival How does energy flow in Chemical Reactions? Chemical Reaction : forming and breaking chemical bonds among atoms Reactants: starting materials Products: result of the reaction Often reversible and can go in both directions*** Often Exergonic Reactions A+B C+D Energy released Ex.) Respiration High energy reactants (CH 2 OH;OH;O 2 ) low energy products (CO 2 ; H 2 O) Energy Released Activation energy needed to ignite glucose Endergonic Reactions- require energy Reactants have less energy than products Requires input of energy
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This note was uploaded on 04/07/2011 for the course BIOL 1001 taught by Professor Minor during the Spring '08 term at LSU.

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BIOL 1001Feb24 - BIOL 1001 Feb.24 QUIZ: why is it possible...

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