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Nucleic Acids

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

guanine
thymine
adenine
cytosine

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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

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

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Nucleic Acids
Nucleoside is a pyrimidine or purine base

hydrogen bonded to a sugar
None of these
ionically bonded to a sugar
covalently bonded to a sugar

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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
can be hydrolyzed by OH- ion
stabilize Watson-Crick H-bonds

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Nucleic Acids
Nucleic acids can be analyzed experimentally by their

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

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Nucleic Acids
A five carbon sugar lacking a hydrogen at the number 2 carbon is found in

RNA
DNA
rDNA
mRNA

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