If a group made up of 50% boys and 50% girls is asked to read a passage, then the girls will remember more of what they read than the boys because girls have better memories than boys.
Explanation:
A hypothesis is a statement that explains what you think will happen in an experiment and why. It is framed as "if...then...because." The "because" part should be based on research and not personal opinion. A good hypothesis will be more than a single sentence, and will cite research on the subject.
It would be "the amount of ATP produced" that best distinguishes glycolysis and the Krebs cycle from the electron transport chain since this is the basis of energy creation.