bio quiz 11/4
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Last updated 12:32 PM on 11/4/22
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20 Terms
1
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energy
The ability to do work or cause change
2
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examples of different forms of energy
-chemical
-mechanical
-thermal
-electrical
-kinetic
-potential (stored energy)
-mechanical
-thermal
-electrical
-kinetic
-potential (stored energy)
3
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free energy
the energy available in a system for work
4
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chemical equations
represent chemical reactions
5
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reactants and products
-reactants are shown on left side of the equation, products on the right.
-in reactions the amount of product must equal the amount of reactants
-in reactions the amount of product must equal the amount of reactants
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Equilibrium
reached when both the reactants and products are made at the same rate
7
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bond energy
the energy needed to break a bond between two atoms
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where does most of an organism's energy come from?
sugar in foods
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exothermic/exergonic reactions
release more energy than it absorbs
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endergonic/endothermic reactions
store energy
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what are most reactions in cells?
endergonic
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activation energy
energy needed to start a reaction
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catalysts
-lower the amount of activation energy needed
-called enzymes, and are usually proteins
-often end with suffix '-ase'
-called enzymes, and are usually proteins
-often end with suffix '-ase'
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properties of enzymes
-they speed up a reaction by lowering the activation energy
-very specific
-proteins
-may work on 1 or 2 substrates at the most
-reusable
-work by induced fit
-adversely effected by temperature
-very specific
-proteins
-may work on 1 or 2 substrates at the most
-reusable
-work by induced fit
-adversely effected by temperature
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define solution
a mixture in which 2 or more substrates are uniformly distributed in another substance.
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solute
is dissolved in the solvent in a solution
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water
the universal solvent
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When does a solution become saturated?
when no more solute will dissolve
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aqueous solutions
have water as the solvent & are important to LIFE
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denature
when enzymes come apart & can no longer function
