What does 80s ribosomes mean? Are …
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Yogita Ingle 5 years, 3 months ago
The cytoplasmic chromosome of eucaryotes are 80 S. They occur inside the cytoplasm of eukaryotes either freely or attached to ER. The ribosomes are large in size with a length of (300-340 Angstrom) and breadth (200-240 Angstrom). The two subunits of 80S ribosomes are 60S and 40S. A tunnel occurs between the two subunits for passage of mRNA. The large subunit has a groove for pushing out the newly synthesized polypeptide. 80S ribosomes are synthesized inside the nucleolus. 80S ribosomes do not become functional inside the nucleous. Their subunits come out of the nucleus and become operational in cytoplasm. 40S subunit of 80S ribosome contains 33 protein molecules and a single 18S rRNA. 60S subunit has 40 protein molecules and three types of rRNAs- 28S, 5.8S and 5S.
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