Question

question 25 of 30 the endoplasmic reticulum (er) consists of two distinct regions known as smooth er and rough er. classify each about structure and function as characteristics of smooth er, rough er, or both. smooth er rough er both its surface that faces the cytoplasm lacks ribosomes. its surface that faces the cytoplasm is studded with ribosomes. answer bank a major function is the manufacture of proteins. it stores calcium ions. it is part of the endomembrane system. a major function is lipid synthesis.

Explanation:

Smooth ER lacks ribosomes, functions in lipid synthesis and calcium - ion storage. Rough ER has ribosomes and makes proteins. Both are part of endomembrane system.

Answer:

Smooth ER: Its surface that faces the cytoplasm lacks ribosomes, A major function is lipid synthesis, It stores calcium ions.
Rough ER: Its surface that faces the cytoplasm is studded with ribosomes, A major function is the manufacture of proteins.
Both: It is part of the endomembrane system.