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Nucleic Acids

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

rDNA
DNA
RNA
mRNA

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Nucleic Acids
The sugar in RNA is __________ , the sugar in DNA is __________

ribose, uracil
ribose, deoxyribose
ribose, phosphate
deoxyribose, ribose

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Nucleic Acids
Which of the following is a purine?

Uracil
Thymine
Adenine
Cytosine

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Nucleic Acids
The glycosidic bonds in DNA and RNA

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

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

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

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

Uracil
Cytosine
Adenine
Thymine

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