Biol1510_F07_Energy_enzymes_a

Biol1510_F07_Energy_enzymes_a - 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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Thermodynamics First law: energy cannot be created or destroyed Second law: in any energy conversion, some energy is wasted and unavailable for work; moreover, the entropy of any closed system always increases.
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Q: 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 create order by using energy from the sun. c. Living organisms create order locally, but the energy transformations generate waste heat that increase the entropy of the universe.
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Gibb's free energy and work Free energy (G) = Enthalpy (H) - Temperature (T) x Entropy (S) 2200 G = H - T S
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Exergonic vs Endergonic reactions
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All spontaneous reactions proceed toward equilibrium All chemical reactions, even endergonic ones, are theoretically reversible; explain.
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Are chemical reactions at equilibrium in living cells?
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Biol1510_F07_Energy_enzymes_a - What drives biological...

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