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B1510_module3_4_energy_enzymes

B1510_module3_4_energy_enzymes - What drives biological...

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What drives biological reactions? Energy – how do the laws of thermodynamics affect living organisms? How do enzymes work?
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Which law of thermodynamics does this energy pyramid illustrate? First law: energy cannot be created or destroyed Second law: in any energy conversion, some energy is wasted; moreover, the entropy of any closed system always increases.
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If entropy always increases, then how do living organisms create macromolecules, organelles, cells, tissues, and complex higher-order structures? a) The laws of thermodynamics do not apply to living organisms. b) Living organisms use energy from the sun to accomplish the work of decreasing entropy. c) Living organisms use energy to decrease their own entropy, but generate waste heat that increases the total entropy of the organism and its environment. d) Living organisms convert light energy or chemical energy into organic matter. e) Both c) and d)
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Gibb's free energy and work Free energy (G) = Enthalpy (H) - Temperature (T) x Entropy (S) G = H - T S Exergonic vs Endergonic reactions
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How do fireflies light up?
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