Question

at what point does post - translational modification of products take place in the golgi body? during the beginning of the receiving process after the modified proteins have been shipped during the transfer from receiving to shipping

Explanation:

The Golgi body receives products (like proteins from the endoplasmic reticulum) at its cis - face (receiving side). Then, it modifies these products (e.g., through glycosylation). After modification, it ships them out from the trans - face (shipping side). So, the modification occurs during the transfer from the receiving to the shipping part of the Golgi body.

Answer:

during the transfer from receiving to shipping