SPECTROSCOPY QUIZ

Nucleic acids can be analyzed experimentally by their

none of these

absorption of uv light

absorption of visible light

molecular weight

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The most stabilizing force for nucleic acids is

conformational entropy

Van der Waals

hydrogen bonds

electrostatic bond

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A nucleotide consists of

paired bases

a sugar, a base and three phosphates

a sugar, a base and a phosphate

a sugar and a phosphate

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

guanine

thymine

adenine

cytosine

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Thymidine

is replaced by uracil in RNA

normally forms two hydrogen bonds with adenosine

can participate in hydrophobic interactions due to its methyl group

All of these

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

RNA

rDNA

DNA

mRNA

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Which of the following is a purine?

Adenine

Thymine

Uracil

Cytosine

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Nucleoside is a pyrimidine or purine base

None of these

hydrogen bonded to a sugar

covalently bonded to a sugar

ionically bonded to a sugar

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Nucleotide bases and aromatic amino acids absorb light respectively at

270 and 280 nm

280 and 260 nm

260 and 270 nm

260 and 280 nm

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In gel electrophoresis, what fragments will move most quickly through a gel?

Small fragments

None of these

Large fragments

Large genome

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