If it takes energy to break bonds and you gain energy in the formation of bonds, how can some reactions be exothermic while others are endothermic?
A) It is the total amount of energy that matters. Sometimes some bonds are stronger than others and so you gain or lose energy when you form them.
B) It is the total number of bonds that matters. Sometimes you create more bonds than you break and since all bonds have same amount of energy you gain or lose energy depending on the number of bonds.
C) Some reactants have more energetic bonds than others and they will always release energy.
D) Some products have more energy than others and they always require energy to be formed.
E) none of the above
Question 2
How are proteins similar to starch?
A) Both are polymers.
B) Both can be consumed and used as an energy source.
C) Both are made of glucose monomers.
D) Both are lipids.
E) A and B
Energy Coupling
Changes in the free energy (DG) of exergonic and endergonic reactions
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Ionization energy
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Energy In, Energy Out