Ventricles and Cerebrospinal Fluid
I'm pretty sure the answer is D. Sedimentary Rock. Hope this helps!
Exocytosis is the correct answer. Zymogens like pepsinogen are leaving, not entering the cell, so it's not exocytosis. They are too large for channel protein transport or simple diffusion. They are "shipped" outside the cell via vesicular transport into the gastric lumen, where catabolism of proteins can begin.
DNA is located in the nucleus of the cell, and makes up the chromosome found there. DNA is often called the building blocks of an organism?????