Struggling with your prescribed literature?
Our Literature Study Guides provide insights and analysis of themes and characters and includes guidelines for writing your exam.
the movement of molecules across a membrane against the concentration gradient, from an area of...
a state in which the body has become dependent on a chemical substance in order to function.
a molecule that is converted to adenosine triphosphate (ATP) for energy storage.
a molecule that stores large amounts of energy that can be used for metabolic activity.