Q. Polysome is formed by
A) Several ribosomes attached to a single $m$RNA
B) Many ribosomes attached to a strand of endoplasmic reticulum
C) A ribosome with several subunits
D) Ribosomes attached to each other in a linear arrangement
Explanation
In prokaryotes, ribosome attach to the 5’ end of $m$RNA as soon as transcription begins. A bunch of ribosome moves along a single $m$RNA molecule adding 15 amino acids/second to the polypeptide chain, almost the same speed at which RNA polymerase transcribes the $m$RNA.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.