Q.AMP
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Start your 14-day free trial to unlock the full solution →Step 1. Draw a five-membered D-ribose furanose ring, numbered C-1' through C-5' (primes distinguish sugar numbering from the base's own numbering, section 14.4.1), with free -OH groups shown at both C-2' and C-3' (this is what marks the sugar as ribose, not deoxyribose).
Step 2. Attach the base adenine to the sugar's anomeric carbon, C-1': since adenine is a purine base, the bond is formed through adenine's own ring nitrogen at position 9 (N-9), following the purine-bonding rule of Fig. 14.26.
Step 3. Attach a single phosphate group, drawn as -O-P(=O)(OH)-O-CH2- leading into the sugar ring, esterified specifically onto the sugar's C-5'-OH position (not C-2' or C-3') -- this phosphate-at-5' placement is what converts the nucleoside (adenosine) into the nucleotide, AMP (adenosine monophosphate), per Fig. 14.27. …
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