Multiple choice

What makes SER different from RER?

  1. The presence of DNA in RER

  2. The presence of DNA in SER

  3. The presence of ribosomes in SER

  4. The presence of ribosomes in RER

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The key difference is that RER (Rough Endoplasmic Reticulum) has ribosomes attached to its surface, which is why it appears rough under a microscope. SER (Smooth Endoplasmic Reticulum) lacks ribosomes and has different functions like lipid synthesis. Neither contains DNA.