NTA Abhyas NEET2020BotanyCell - The Unit of LifePractice
What is true about ribosomes?
Options
- AThe prokaryotic ribosomes are 80S, where "S" stands for sedimentation coefficient
- BThese are composed of ribonucleic acid and proteins
- CThese are found only in eukaryotic cells
- DThese are self-splicing introns of some RNAs.
Correct answer
B. These are composed of ribonucleic acid and proteins
Step-by-step solution
Ribosomes are non-membranous (i.e., without membrane) cell organelles composed of rRNA and protein. These are found in both prokaryotic and eukaryotic cells. In prokaryotes, ribosomes are 70s type, whereas in eukaryotes, they are 80S type.