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Nucleic Acids

Nucleic Acids
Which pyrimidine base contains an amino group at carbon 4?

Uracil
Cytosine
Thymine
Adenine

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Nucleic Acids
Nucleic acids can be analyzed experimentally by their

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

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Nucleic Acids
Because DNA is a highly charged polyanion, its stability to heat denaturation

decreases with increasing salt
increases with increasing salt
does not depend on hydrophobic interactions
is independent of G - C content

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

mRNA
rDNA
RNA
DNA

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

cytosine
thymine
adenine
guanine

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Nucleic Acids
Which of the following is a purine?

Adenine
Uracil
Cytosine
Thymine

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