The golgi apparatus packages proteins into vesicles inside of the cell before sending them to their destinations. The golgi apparatus processes proteins for secretions that contain enzymes that attach sugar monomers to proteins.
If the golgi apparatus is not present the packaging and transport of materials would cease to happen. So, various substances such as sugar monomers would not be able to be transformed into proper forms for further use.
The secretory activities of the cell would also cease to occur.
Also, if there is no golgi apparatus, the plasma membrane would be affected because it needs to be able to grow larger for cell division.