Biology - Nucleotides and Nucleic Acids

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6 Terms

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Components of DNA nucleotide

Deoxyribose, a phosphate group and one of the four nitrogenous bases (Adenine, Guanine, Cytosine and Thymine)

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Components of RNA nucleotide

Ribose, phosphate group and on of the nitrogenous bases (Adenine , Guanine, Cytosine and Thymine)

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How do nucleotides join together

Phosphodiester bonds formed in condensation reactions

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DNA molecule

Double helix composed of two polynucleotides joined together by hydrogen bonds between complementary bases. A-T and G-C

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RNA molecule

Relatively short single polynucleotide chain

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Semi Conservative Replication

The double helix unwinds and the hydrogen bonds between the complementary bases break using DNA Helicase thus seperating the two strands of DNA

Both strands are used as templates and compementary base pairing occurs between the template strands and free nucleotides

Adjacent nucleotides are joined by phosphodiester bonds formed in condensation reactions using DNA Polymerase.