USC Bridge 2.6 Nucleic Acids

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Nucleic acids

Composed of the largest molecules in the body: C,H,O,N and P

nucleic axis polymers are made up of monomers called nucleotides. Composed of nitrogen base, a pentose sugar, and a phosphate group

two major classes: deoxyribonucleic acid (DNA) and robonucleic acid (RNA)

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RNA

Links DNA to protein synthesis and is slightly different from DNA

single stranded linear molecule is active mostly outside nucleus

contains a ribose sugar, DNA has a deoxyribose sugar

thymine is replaced with uracil

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Complementary bases of DNA:

Adenine, thymine, cytosine, and guanine

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Complementary sequences of DNA

Adenine pairs with thymine

cytosine pairs with guanine

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DNA and RNA are:

Nucleic acids

polymers made of subunits called nucleotides

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Purines

The nitrogenous bases guanine and adenine each have two linked rings of atoms.

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Pyrimidines

Cytosine, thymine and uracil each have a single ring.

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The main function of DNA is

Protein production

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Which is the base in DNA but not RNA?

Thymine