The primary manner for the deamination of amino acids in muscle involves (    ).  A: purine nucleotide cycle B: oxidative deamination of glutarate  C: transamination  D: ornithine cycle  E: conjunction of transamination and purine nucleotide cycle F: conjunction of transamination and oxidative deamination

Which amino acid is involved in both purine and pyrimidine synthesis： A: Asp B: Gln C: Gly D: Asn

Nitrogen or carbon atoms are contributed to the structure of the purine ring by amino acids, except: A: Glycine B: Glutamine C: Aspartate D: Glutamate

Which of the following is the end production of purine nucleotide catabolic metabolism? A: urea B: creatine C: creatinine D: uric acid E: β-alanine

Which of the following compounds have the feedback inhibition effect on purine nucleotide synthesis ( ). A: IMP B: uric acid C: AMP D: GMP

Which of the following is not the direct material of de novosynthesis of purine nucleotide ? () A: glycine B: aspartate C: glutamate D: CO2 E: one carbon unit

2. The reason why the incidence of hyperuricemia and gout has increased so rapidly in China is because of A: A. increasing competitive pressure B: B. excessive intake of high nutrition, high purine and high protein diet C: C. poor diet and lifestyle habits D: D. all of the above