An organelle that is a stack of flattened, membranous sacs and functions to receive, modify, and package proteins for secretion is the ______.

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The Golgi apparatus is a stack of flattened, membranous sacs that receive, modify, and package proteins for secretion. It is responsible for sorting and directing proteins to their final destinations within the cell or for secretion outside of the cell. The mitochondrion is an organelle responsible for producing energy in the form of ATP. The endoplasmic reticulum is a network of membranous tubes and sacs involved in protein and lipid synthesis. The chloroplast is an organelle found only in plant cells responsible for photosynthesis. The lysosome is an organelle that contains digestive enzymes to break down cellular waste and debris. None of these organelles match the description of the "stack of flattened, membranous sacs" responsible for modifying and packaging proteins for secretion, except for the Golgi apparatus.

An Organelle That Is a Stack of Flattened, Membranous Sacs