Why doesn't the enzyme pepsin (present in the stomach) work in the small intestine? Select one: a. The enzyme deteriorates due to change in temperature as it enters the intestine. b. The enzyme deteriorates due to lack of substrate molecules in the intestine. c. The enzyme deteriorates due to the basic pH environment of the intestine.

Asap 1. what happens to particles when a substance gains energy and changes state? 2. what happens to the energy that is lost when water freezes? 3. how does the movement of particles in a stick of butter differ from the movement of particles in a dish of melted butter? 4. as water is cooled, at what temperature do its particles become fixed in place? 5. how do evaporation and boiling differ?