POB ch 6 Flashcards

1
Q

Kinetic energy

A

energy in motion

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2
Q

Potential energy

A

stored energy

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3
Q

Chemical Energy

A

food energy

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4
Q

Mechanical energy

A

movement

chemical –>mechanical

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5
Q

First Law of Thermodynamics

A

law of conservation of energy

-energy cannot be created of destroyed, but it can be changed from one form to another

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6
Q

Second Law of Thermodynamics

A

-energy cannot be changed from one form to another without a loss of unstable energy

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7
Q

Entropy!!!!

A

the relative amount of disorganization in the universe

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8
Q

clean bedroom example

A
  • more organized
  • more potential
  • less stable
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9
Q

dirty bedroom example

A
  • less organized
  • less potential
  • more stable
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10
Q

enzyme

A

speeds up a chemical reaction, not used up by the reaction

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11
Q

metabolism

A

the sum of all the chemical reactions that occur in a cell; breaking down and building up of molecules

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12
Q

catabolism

A

breaking down of molecules

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13
Q

anabolism

A

building up molecules in a reaction

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14
Q

free energy

A

the amount of energy available that is still “free” to do work

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15
Q

exergonic reactions

A

spontaneous and release energy

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16
Q

endergonic

A

require an input of energy

17
Q

structure of ATP

A

nitrogen containing base
5 carbon sugar ribose
3 phosphate groups

18
Q

functions of ATP

A

chemical work, transport work, and mechanical work

19
Q

coupled reactions

A

energy released by an exergonic reaction is used to drive an endergonic reaction

20
Q

metabolic pathway

A

series of linked reactions where reactions occur

21
Q

substrate

A

the reactants in an enzymatic reaction

22
Q

energy of activation

A

the energy that must be added to cause molecules to react with one another

23
Q

Enzymes ____ the amount of energy required for activation to occur

24
Q

active site

A

the part that complexes with the substrate; they fit together like lock and key!!!

25
induced fit model
change in the shape of an enzyme's active site that enhances the fit between the active site and the substrates
26
factors affecting enzymatic speed
- substrate concentration: enzyme increases as substrate concntration increases - temp: temp increases enzyme activity increases - ph: enzyme has a preferred ph at which the rate of reaction is the highest - enzyme activation: occurs in many different ways, - enzyme inhibition: occurs when the substrate is unable to bind to the active site of an enzyme - (feedback inhibition) : products bind to active site or other sire that change the shape of an active site - enzyme cofactors: inorganic ion or nonprotein organic molecules that assist in a reaction
27
cofactors
inorganic ions such as copper, zinc, or iron that assist the enzyme
28
coenzyme
organic, nonprotein molecules (Vitamins)