Question

What causes rough endoplasmic reticulum to look “rough” under a microscope?

a Rough ER has lots of surface area.

b Rough ER has many membrane packages.

c Rough ER makes lipids.

d Rough ER has ribosomes attached to it.

Answer 1

Rough ER has ribosomes attached to it.

Answer 2

Answer:

Correct answer is D.

Explanation:

Rough endoplasmic reticulum looks "rough" (see first picture) under electron microscope compared to the smooth endoplasmic reticulum (see second picture). The small grayish/black dots are the ribosomes attached to the ER, helping with the translation of  RNA to protein.