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
A: glycine
B: aspartate
C: glutamate
D: CO2
E: one carbon unit
举一反三
- 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 amino acid can not produce one carbon unit?
- 2. Organic chemistry is also known as carbon chemistry, which of the following material options belongs to the study object of organic chemistry? A: CO、CO2、C60 B: CO、CO2、CS2 C: CaC2、WC、SiC D: CH4、HCOOH、C2H5OH
- 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