Becker's World of the Cell 9th Edition by Lewis Kleinsmith, Jeff Hardin, Gregory Paul Bertoni

Exercise 2

Endoplasmic Reticulum. For each of the following statements, indicate if it is true of the rough ER only (R), of the smooth ER only (S), of both rough and smooth ER (RS), or of neither (N).
(a)Contains less cholesterol than does the plasma membrane.
(b)Has ribosomes attached to its outer (cytosolic)surface.
(c)Is involved in the detoxification of drugs.
(d)Is involved in the breakdown of glycogen.
(e)Is the site for biosynthesis of secretory proteins.
(f )Is the site for the folding of membrane-bound proteins.
(g)Tends to form tubular structures.
(h)Usually consists of flattened sacs.
(i)Visible only by electron microscopy.