Q. Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as

 1812  211 Cell : The Unit of Life Report Error

Solution:

Polysome is a string of ribosomes associated with a single mRNA. It helps to produce a number of copies of the same polypeptide.
Nucleosome is the unit of eukaryotic DNA that consists of a DNA segment wrapped around a core of eight histone proteins.
Plastidome refers to all the plastids of a cell which work as a functional unit.
Polyhedral bodies or carboxysomes are present in several groups of autotrophic bacteria that assimilate inorganic carbon via Calvin cycle, e.g. cyanobacteria.