Practice problem
Golgi Apparatus — Structure & Function
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The image below shows a Golgi apparatus and several other structures inside a cell. Use this image to answer the question that follows.
Image source: By Louisa Howard [Public domain], via Wikimedia Commons
The pink arrow is pointing at a small sac that has pinched off the Golgi body. This sac contains proteins and eventually moves across the cell.
What is the identity of the object marked with a "?" in the image above?