How do electrons gain energy in photosystem i? a. they take energy from the atp molecules b. they absorb photons. c. they use energy from a hydrogen ion pump d. they use energy in the form of glucose.

An easy way to calculate the amount of energy available at each level is to what?

Nucleic acid certain protein cell membranes certain carbohydrates

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.