Astudent designed a model of active transport. in order to refine the model to be more accurate, what should be added to the diagram?
a) the addition of adp being converted to atp should be added to the model to show that energy is being stored during the process.
b) the addition of atp being converted to adp should be added to the model to show that energy is being used to transport materials.
c) the addition of a negative charge to the outside of the cell and a positive charge to the inside of the cell should be added to show that voltage differences are used in the transport process.
d) the addition of a positive charge to the outside of the cell and a negative charge to the inside of the cell should be added to show that voltage differences are used in the transport process.