"The rotating part of the microscope at the bottom of the body tube; it holds the objectives." -utahscience.oremjr.alpine.k12.ut.us
Answer:
ATP
Explanation:
ATP is an energy storing molecule which can help with active processes like active transport. It stands for Adenosine triphosphate
By the ligand receptors on the surface of the cell membrane. How do transport proteins make it easier for certain molecules to diffuse across a membrane.
the binding of a signaling molecule, or ligand, to its receiving molecule, or receptor.
I believe it is a microscope
