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Quiz 3

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Justine C.
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10 Questions

Gibbs free energy is more likely negative when_________.

entropy increases and enthalpy is low

The 2nd law of thermodynamics stipulates that_______.

entropy increases

An enzymatic reaction will most likely proceed if_________.

the activation energy is lower than the energy expended to promote a reaction.

Energy carriers are activated________.

during the breakdown of molecules

Gibbs free energy is negative when_______.

bonds are broken

•𝚫G indicates_______.

the change in a reaction from substrate to product

In Catabolism, molecules are____whereas in Anabolism molecules are_______.

broken down; synthesized

Which of the molecules below are activated carriers?

All of the above.

Equilibrium refers to a state where_______.

reactants and products do no longer change

Enzymes________.

lower the activation energy without participating in the reaction between two reactants leading to a product.

Study Notes

Thermodynamics and Reactions

  • Gibbs free energy is more likely negative when the reaction is spontaneous.
  • The 2nd law of thermodynamics stipulates that the total entropy of a closed system always increases over time.

Enzymatic Reactions

  • An enzymatic reaction will most likely proceed if the substrate binds to the active site of the enzyme.
  • Energy carriers are activated when they carry energy from one reaction to another.

Gibbs Free Energy

  • Gibbs free energy is negative when the reaction is spontaneous and favorable.
  • ΔG indicates the change in Gibbs free energy.

Metabolism

  • In Catabolism, molecules are broken down to release energy, whereas in Anabolism molecules are built up to store energy.

Activated Carriers

  • ATP, NADH, and FADH2 are activated carriers.

Equilibrium

  • Equilibrium refers to a state where the rates of forward and reverse reactions are equal.

Enzymes

  • Enzymes act as biological catalysts to speed up chemical reactions in living organisms.

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