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Chapter 28: Q28-10P (page 954)
What is the base sequence in the original DNA strand on which the mRNA sequence in problem 28-9 was made?
CUU-AUG-GCU-UGG-CCC-UAA
Thebase sequence in the original DNA strand 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\({{\bf{M}}^ + }{\rm{ = 84}}\)
Identify the following bases, and tell whether each is found in DNA, RNA, or both.
Question: One of the steps in the biosynthesis of uridine monophosphate is the reaction of aspartate with carbamoyl aspartate, followed by cyclization to form dihydroorotate. Propose mechanisms for both steps.
Draw the structure of cyclic adenosine monophosphate (CAMP), a messenger involved in the regulation of glucose production in the body. Cyclic AMP has a phosphate ring connecting the 3'- and 5'-hydroxylgroups in adenosine.
Identify the following nucleotide, and tell how it is used.
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