2.5-DNA and RNA

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Biology

Genetics

A-Level Biology

Edexcel A (SNAB)

Last updated 6:47 AM on 6/10/25
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5 Terms

1
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Describe the structure of a DNA mononucletide

Has a phosphate group, deoxyribose sugar and a nitrogen containing base

2
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Describe how a DNA mononucleotide joins to form a polymer

Form phosphodiester bonds between the phosphate and sugar via condensation reaction, catalysed by DNA polymerase

3
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Describe the structure of an RNA mononucleotide

Has a phosphate group, ribose sugar and nitrogenous bases

4
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Describe how RNA mononucleosis’s form a polymer

Form phosphodiester bonds between the phosphate group and pentose sugar via condensation reaction, catalysed by RNA polymerase

5
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Describe how DNA forms a double helix

Form hydrogen bonds between complimentary nitrogenous bases of 2 strands