The upcoming discussion will update you about the differences between 80S and 70S Ribosomes. Difference # 80S Ribosomes: 1. They occur only in eukaryotic cells. 2. They occur inside the cytoplasm of eukaryotes either freely or attached to ER. 3. The ribosomes are larger in size with a length of (300—340 A) and breadth (200—240 A). 4. The sedimentation co-efficient [...]
In this article we will discuss about:- 1. Discovery of Ribosomes 2. Occurrence of Ribosomes 3. Functions. Discovery of Ribosomes: Ribosomes were discovered by Robinson and Brown (1953) in plant cells and by Palade (1955) in animal cells. Palade (1955) also coined the term of ribosome. A large number of ribosomes occur in a cell. For example, a single cell [...]
Quick Notes on Ribosomes! Structure of Ribosomes in Cell: Ribosomes are cytoplasmic non- membranous ribonucleoprotein granules of 150 -200 A diameter. They have a typical binary and constricted structure with the two units being unequal in size. The prokaryotic and eukaryotic ribosomes are differentiated on the basis of the sedimentation coefficient. These are of two basic types, 70S and BOS [...]