Which Structure is Described as Rough or Smooth

Question

Which structure is described as rough or smooth?
A) Ribosome
B) Mitochondrion
C) Cilia
D) Endoplasmic reticulum

Accepted Answer

The endoplasmic reticulum can be either rough or smooth depending on the presence or absence of ribosomes on its surface. The rough endoplasmic reticulum has ribosomes and appears bumpy or rough, while the smooth endoplasmic reticulum lacks ribosomes and appears smooth.