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Cell Biology > L22 Biophysics: Kinetics > Flashcards

L22 Biophysics: Kinetics Flashcards

1
Q

Kinetic energies follow a…

A

Maxwell Boltzmann distribution

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2
Q

The maxwell Boltzmann distribution describes the relationship between temperature and…

A

Kinetic energy

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3
Q

The mean kinetic energy of a solution is determined by…

A

Temperature

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4
Q

3 factors influencing the rate of reaction…

A
  1. Kinetic energy (I.e. temperature)
  2. Catalysis
  3. Concentration
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5
Q

Higher concentration may increase rate of reaction due to an…

A

Increase in the number of collisions between reactants

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6
Q

Enzyme catalysis up increases the rate of reaction by providing an alternative reaction pathway with a…

A

Lower activation energy

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7
Q

First order reactions increase in rate…

A

Linearly as concentration of reactant increases

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8
Q

As the concentration of reactants increases, second order reactants increase in rate…

A

Exponentially (I.e. [X]^2)

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9
Q

Reaction order must be determined experimentally as there may be…

A

Additional unknown rate limiting intermediate steps

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10
Q

At equilibrium the rate of reaction in both directions is equal. From this we can derive the…

A

Equilibrium constant

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11
Q

Equilibrium constant Kc is…

A

Fixed at a given temperature

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12
Q

If Kc is much more than 1, the reaction at equilibrium will yield mostly…

A

Product

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13
Q

If Kc is much less than 1, the reaction at equilibrium will yield mostly…

A

Reactant

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14
Q

If Kc is around 1 (~0.001 - 1000) the reaction at equilibrium will yield…

A

A mix of product and reactant

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15
Q

Equilibrium constant can be used to calculate the equilibrium concentrations given the…

A

Initial concentrations

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16
Q

Equilibrium constant can be calculated even when we don’t know the intermediate steps. This is known as the..

A

Principle of detailed balance (because at equilibrium backwards and forwards rates must be balanced, by definition)

17
Q

To calculate equilibrium constant divide…

A

Concentrations of products by concentrations of reactants

all raised to the power of their respective orders

18
Q

Le Chatalier’s principle describes how systems at equilibrium…

A

Respond to perturbation

19
Q

Equilibrium can be visualised as the point of lowest energy on a parabolic curve. If we add more product and so move up the curve in one direction…

A

More reactant will be produced, thus sliding back to the equilibrium point

20
Q

Delta G server,ones if a reaction is…

A

Favourable

21
Q

Delta G is closely related to the…

A

Equilibrium constant

22
Q

Small changes to delta G have a…

A

Big effect of the equilibrium constant

Because delta G is related by exponent

Cell Biology (21 decks)

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