Question

the endoplasmic reticulum is a membrane - bound series of sacs and tubules that functions in storage. transport. dna replication. carbohydrate metabolism.

Explanation:

The endoplasmic reticulum is involved in transport and storage. It is not directly related to carbohydrate metabolism (which is more related to mitochondria and cytoplasm in some aspects) and not involved in DNA replication (which occurs in the nucleus).

Answer:

transport, storage