Answer:
It's A
Explanation:
The answer is the number of protons plus the number of neutrons.
In exocytosis,cells release material such as proteins like enzymes from within the cell into the extracellular space. Endocytosis is where a cell transports molecules such as proteins <span>into the cell. The complimentary and twined processes can be used for the transport of proteins as an example.</span>
