Q. Which one of the following organelles is not surrounded by any membrane?
A) Mitochondrion
B) Vacuole
C) Endoplasmic reticulum
D) ribosome
Explanation
Ribosomes are large, non-membranous RNA-protein complexes, which are necessary for protein synthesis.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.