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They differ due to their structure and function.
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1. it is a non spontaneous chemical reaction
2. change in gibs free energy (∆G) is positive ie., ∆G>0
3. entropy is included in any change in gibs free energy. ie, ∆G= ∆H-T.∆S
where,
∆G = change in gibs free energy
∆H= change in enthalpy
∆S= change in entropy
T= temperature in kelvin
4. in this reaction the total amount of energy is a loss, (ie., more energy is needed to start the reaction than the energy obtained from it)
5. total energy is a negative net result.
6. in metabolism endergonic process is anabolic, ie., energy is stored.
7. examples: protein synthesis, Na+/K+ pump (drives nerve conduction and muscle contraction).
If I remember correctly, it splits the water molecules
