40. Which molecules require 5-phosphoribosyl-1-pyrophosphate (PRPP) for biosynthesis? 1) arginine,2) phenylalanine, 3) histidine; 4) tryptophan, 5) tyrosine, 6) methionine. (A) 1,6 (B) 2, 5 (C) 3, 4 (D) 4, 6

40. Which molecules require 5-phosphoribosyl-1-pyrophosphate (PRPP) for biosynthesis? 1) arginine,2) phenylalanine, 3) histidine; 4) tryptophan, 5) tyrosine, 6) methionine.
(A) 1,6
(B) 2, 5
(C) 3, 4
(D) 4, 6

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Which molecules requ...

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8. In DNA sequencing by the Sanger (dideoxy) method: (A) the template DNA strand is radioactive. (B) radioactive dideoxy ATP is included in each of four reaction mixtures before enzymatic synthesis of complementary strands. (C) specific enzymes are used to cut the newly synthesized DNA into small pieces, which are then separated by electrophoresis. (D) the role of the dideoxy CTP is to occasionally terminate enzymatic synthesis of DNA where Gs occur in the template strands.

40. Which molecules require 5-phosphoribosyl-1-pyrophosphate (PRPP) for biosynthesis? 1) arginine,2) phenylalanine, 3) histidine; 4) tryptophan, 5) tyrosine, 6) methionine.
(A) 1,6
(B) 2, 5
(C) 3, 4
(D) 4, 6

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