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Chapter 28: Q28-6P (page 951)
From what DNA base sequence was the following RNA sequence transcribed?
(5鈥�) UUCGCAGAGU (3鈥�)
The DNA base sequence from which this RNA sequence is transcribed can be written as .
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Propose structures for compounds that fit the following mass-spectral data:
(a) A hydrocarbon with\({{\bf{M}}^ + }{\rm{ = }}{\bf{132}}\)
(b) A hydrocarbon with\({{\bf{M}}^ + }{\rm{ = }}{\bf{1}}66\)
(c) A hydrocarbon with\({{\bf{M}}^ + }{\rm{ = 84}}\)
Show how uracil can form strong hydrogen bonds to adenine.
The final step in DNA synthesis is deprotection by treatment with aqueous ammonia. Show the mechanisms by which deprotection occurs at the points indicated in the following structure:
Question: The codon UAA stops protein synthesis. Why does the sequence UAA in the following stretch of mRNA not cause any problems?
-GCA-UUC-GAG-GUA-ACG-CCC-
Question: Which of the following base sequences would most likely be recognized by a restriction endonuclease? Explain
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