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Nucleic Acids

Nucleic Acids
Which of the following is found on RNA but not DNA?

Uracil
Adenine
Deoxyribose
Phosphate

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Nucleic Acids
The glycosidic bonds in DNA and RNA

are free to rotate over about 180°
connect the sugar to the base
stabilize Watson-Crick H-bonds
can be hydrolyzed by OH- ion

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Nucleic Acids
The unfavourable free energy associated with not satisfying a hydrogen bond after formation of the double helix is approximately

10 kJ/mol
30 kJ/mol
25 kJ/mol
20 kJ/mol

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Nucleic Acids
A purine with an amine (NH2) group on the 6th carbon is

thymine
adenine
cytosine
guanine

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Nucleic Acids
Nucleic acids can be analyzed experimentally by their

absorption of visible light
absorption of uv light
none of these
molecular weight

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Nucleic Acids
The most stabilizing force for nucleic acids is

Van der Waals
conformational entropy
hydrogen bonds
electrostatic bond

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