NEET 2018
- Exam
- NEET
- Year
- 2018
- Subject
- Botany
- Chapter
- Cell - The Unit of Life
NEET 2018 · Botany · Cell - The Unit of Life
Many ribosomes may associate with a single mRNA to form multiple...
Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as
Options
- APlastidome
- BPolyhedral bodies
- CPolysome
- DNucleosome
Correct answer
C. Polysome
Step-by-step solution
Polysome is a string of ribosomes associated with a single mRNA. Polysome helps to produce a number of copies of the same polypeptide.
The nucleosome is the unit of eukaryotic DNA that consists of a DNA segment wrapped around a core of eight histone proteins. Nucleosome chain gives a 'beads on a string' appearance under an electron microscope.
Plastidome refer 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 the Calvin cycle, e.g. Cyanobacteria.