NEETBotanyCell - The Unit of Life
How many statements are correct about the organelle? A- They are composed of ribonucleic acid (RNA) and proteins and are not surrounded by a membrane B- The eukaryotic ribosomes are 80S while the prokaryotic ribosomes are 70S C- The two subunits of 80S ribosomes are 60S and 20S D- Subunits of 70S ribosomes are 50S and 30S. E- S is directly a measure of density and size
Options
- A2
- B3
- C4
- D5
Correct answer
B. 3
Step-by-step solution
They are composed of ribonucleic acid (RNA) and proteins and are not surrounded by any membrane. The eukaryotic ribosomes are 80S while the prokaryotic ribosomes are 70S. The two subunits of 80S ribosomes are 60S and 40S while that of 70S ribosomes are 50S and 30S.Here 'S' (Svedberg's Unit) stands for the sedimentation coefficient; it is indirectly a measure of density and size.