RNA molecules are more easily broken down than DNA at a high pH. This can be attributed to the fact that:   RNA has a higher melting temperature than DNA. RNA contains uracil that helps break down the RNA, whereas DNA contains thymine. RNA is single stranded but DNA is double stranded. RNA is a smaller chain than DNA, which makes RNA easier to break apart than DNA. RNA contains an oxygen at the 2' carbon of its ribose sugar whereas DNA does not.

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Chapter13: Gene Expression
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Problem 5TYU: RNA differs from DNA in that the base _______________ is substituted for _______________. (a)...
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RNA molecules are more easily broken down than DNA at a high pH. This can be attributed to the fact that:
 
RNA has a higher melting temperature than DNA.
RNA contains uracil that helps break down the RNA, whereas DNA contains thymine.
RNA is single stranded but DNA is double stranded.
RNA is a smaller chain than DNA, which makes RNA easier to break apart than DNA.
RNA contains an oxygen at the 2' carbon of its ribose sugar whereas DNA does not.
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