What is energy coupling?
a. the hydrolysis of atp to adp p
b. the use of energy released from an exergonic process to drive an endergonic process
c. the energetic relationship between the reactants and products in an exergonic reaction

Pepsin is an enzyme in the stomach that breaks polypeptides into amino acids. pepsin functions best at a ph of around 1.5. what would be the most likely result if the ph of the stomach were increased to 5

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?

Which could be a pathway of food through an ecosystem