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Whatare differenttypesof RNAwhichor foundin cell ? |
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Answer» SOLUTION :RNA molecules areclassifiedaccordingto theirstructureand functioninto three majortypes. (i) RibosomalRNA(r- RNA) (ii ) MessengerRNA ( m - RNA) (III) TransferRNA (t- RNA) . r- RNA : rRNAis mainlyfoundin cytoplasmand in ribosomes,whichcontain 60 %RNAand 40%PROTEIN. Ribosomesare the sitesat whichproteinsynthesistakes place. t- RNA : tRNAmolecules havelowestmolecularweightof all nucliecacids . Theyconsist of 73-94 nucleotides in a SINGLECHAIN . The functionof tRNA is to carryanimoacidsot the sitesof proteinsynthesis onribosomes . m - RNA: mRNAis presentin smallquantityand very short lived. Theyare singlestranded,and theirsynthesistakesplace onDNA . Thesynthesis of mRNA form DNA strandiscalledtransciption . mRNAcarriesgenticinformationform DNAto theribosomes forprotein synthesis. |
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