Difference between the ribosomes of prokaryotic cells and eukaryotic cells
|
Features
|
Prokaryotic Ribosomes
|
Eukaryotic Ribosomes
|
|
Type
|
70S
|
80S
|
|
Size
|
Relatively smaller
|
Relatively larger
|
|
Molecular Weight
|
3 million
|
4-5 million
|
|
Subunits
|
Small-30S
Large-50S
|
Small-40S
Large-60S
|
|
rRNA in subunit
|
3 molecules of RNA:
16S RNA in 30S subunit
23S and 5S in 50S subunit
|
4 molecules of RNA:
18S RNA in 40S subunit
28S, 5S, 5.8S in 60S subunit
|
|
Molecular Weight of RNA
|
16S RNA-5,50,000
23S RNA-11,00,000
5S RNA-40,000
|
18S RNA-7,00,000
28S RNA-17,00,000
5S RNA-39,000
5.8S RNA-51,000
|
|
Number of proteins
|
21 in small subunit
32-34 in large subunit
|
30 in small subunit
50 in large subunit
|
|
Average Molecular Weight of protein
|
18,000
|
21,000
|
|
Number of Amino Acids
|
8,000(approx)
|
16,000(approx)
|
|
RNA:Protein Ratio
|
2:1
|
1:2
|
