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Nucleic Acids

Nucleic Acids
Which of the following is a purine?

Cytosine
Adenine
Uracil
Thymine

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Nucleic Acids
Nucleotide bases and aromatic amino acids absorb light respectively at

260 and 280 nm
270 and 280 nm
280 and 260 nm
260 and 270 nm

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

cytosine
thymine
guanine
adenine

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Nucleic Acids
Nucleoside is a pyrimidine or purine base

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

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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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Nucleic Acids
The glycosidic bonds in DNA and RNA

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

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