Differences between RNA and DNA 2.5 / 5 based on 2 ratings ? BiologyDNA and geneticsASCCEA Created by: Lisa - Team GRCreated on: 05-10-13 16:31 RNA- Single polynucleotide chain DNA- Double polynucleotide chain 1 of 11 RNA- Smaller molecular mass (20 000- 2 000 000) DNA- Larger molecular mass (100 000- 150 000 000) 2 of 11 RNA- May have a single or double helix DNA- Always a double helix 3 of 11 RNA- Pentose sugar is ribose DNA- Pentose sugar s deoxyribose 4 of 11 RNA- Organic bases present are adenine, uracail, guanine and cytosine DNA- Organic bases present are adenine, thymine, guanine and cytosine. 5 of 11 RNA- Ratio of adenine and uracil to guanine and cytosine varies DNA- Ration of adenine and thymine to cytosine and guanine is one. 6 of 11 RNA- Manufactured in the nucleus but found throughout the cell DNA- Found almost entirely in the nucleus 7 of 11 RNA- Amount varies from cell to cell (and within a cell according to metabolic activity) DNA- Amount is constant for all cells of a species (except gametes and spores) 8 of 11 RNA- Chemically less stable DNA- Chemically very stable 9 of 11 RNA- May be temporary- existing for short periods only DNA- Permanent 10 of 11 RNA- Three basic forms: Messenger, Transfer and Ribosomal RNA DNA- Only one basic form, but with an almost infinite variety within that form 11 of 11
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