How many types of RNA and what are they ?

How many types of RNA and what are they ?
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RNA - mainly of two types. Namely: - ( i) genetic RNA and ( ii) non-genetic RNA . There are three types of non-genetic RNA : - ( a) r-RNA or ribosomal RNA (b) m-RNA or messenger (messenger) RNA (c) t-RNA or transfer (mutable) RNA .
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Among the different types of RNA, which one has the highest M.W.? (A) mRNA (B) rRNA (C) yeast RNA (D) tRNA

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What sugars are in RNA ?

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When RNA in hydrolysed there is no relationship among the quantities of four bases obtained like DNA. What does this fact indicate about structure of RNA ?

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