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السؤال الثالث : اختياري وعليه 5 درجات
بأكتب السؤال واجابته تحته بس

1- :the regulation of de novo purine biosynthesis is
synthesis of phosphoribosyl amine from PRPP and glutamine


2- :which one of the following is not correct about heme
heme contain cobalt l in its structure

3-:all of the following statments about bilirubin are correct EXCPET
hemolytic jaundice results in decreased excretion of urinary urobilinogen

4-:which one of the following is not a cause of gout
genetic defects that cause overproduction of pyrimidines

5-which one of the following statments concerning glutamine is INCORRECT:
only fate of glutamine is hydrolsis to glutamate and ammonia

6-Anormal adult is placed on a diet deficient only in phenylalanin . which one of the following statment is correct:
tyrosine becomes an essential amino acid

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