We can describes Ribosomes as workbench of biosynthesis. in general ribosomes are complex ribonucleoproteins particles made up of two subunits & each subunits contains RNA & proteins.
Ribosomes has the ability to catalyze the peptide bonds in both eukaryote & prokaryotes by placing sites for placing mRNA, tRNA & mRNA-tRNA complementary.
Ribosomes are made up of two subunits, large subunit & small subunit & each subunit composed of multiple proteins & one or more than one RNA
you can notice in Prokaryotes, the ribosomes sedimentation is 70S, the whole ribosomes, the small subunits is 30S & the large subunit is 50S. some one may comes to his mined that 30S + 50S = 80S; SO why its 70S not 80S?
will the trick here that subunits are add by sedimentation not mathematically & this addition by sedimentation depends on the weight & mass.
Ribosomes are weighed in KD (kilodaltons). In Eukaryotes, 80S ribosomes are larger & more complex than prokarytoes. the 80S, the whole Ribosomes has a mass of 4200 KD, the small subunit 40S is 1400KD & the large subunit is 2800 KD
Ribosomes has the ability to catalyze the peptide bonds in both eukaryote & prokaryotes by placing sites for placing mRNA, tRNA & mRNA-tRNA complementary.
Ribosomes are made up of two subunits, large subunit & small subunit & each subunit composed of multiple proteins & one or more than one RNA
Ribosomes source | Monomer size | Subunit | |
Small | Large | ||
Prokaryotes | 70S | 30S: 21 proteins 16S RNA | 50S: 34 proteins 23S, 5S, RNA |
Eukaryotes | 80S | 40S: 34 Proteins 18S RNA | 60S: 50 proteins 28S, 5.8s, 5S RNA |
you can notice in Prokaryotes, the ribosomes sedimentation is 70S, the whole ribosomes, the small subunits is 30S & the large subunit is 50S. some one may comes to his mined that 30S + 50S = 80S; SO why its 70S not 80S?
will the trick here that subunits are add by sedimentation not mathematically & this addition by sedimentation depends on the weight & mass.
Ribosomes are weighed in KD (kilodaltons). In Eukaryotes, 80S ribosomes are larger & more complex than prokarytoes. the 80S, the whole Ribosomes has a mass of 4200 KD, the small subunit 40S is 1400KD & the large subunit is 2800 KD
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