I have a question for school and I am a little confused. Identify the following reactions as being either endergonic or exergonic.
NAD+ accepts two electrons and a proton to become NADH.
Sucrose undergoes hydrolysis to form glucose and fructose.
During cellular respiration, glucose and oxygen take part in reactions that yield carbon dioxide and water, and release energy.
Using the energy harvest from sunlight, water and carbon dioxide are converted to glucose and oxygen, during photosynthesis.
Since an exergonic reaction will make energy, and an endergonic reaction will require energy to happen, I think that th third bullet is exergonic, and the fourth is endergonic.
But what about the other two? I'm thinking that the sucrose one would need energy to happen, making it endergonic...and the NADH one is exergonic because it makes something new? I don't really know...Thank you