Which of the following amino acid can not produce one carbon unit?
举一反三
- Which of the following is not the outlet of Acetyl CoA? () A: go into the TCA cycle B: use to synthesize fatty acid C: transition to essential amino acid D: produce ketone bodies E: transition to cholesterol
- A. Carbon skeleton of amino acids are converted into CO2 and H2O, nitrogen is excreted from the body mostly as ammonia B. The carbon skeleton of gluconeogenic amino acid can be converted into glucose but not fat
- One can predict the amino acid sequence of a protein from the nucleotide sequence of its gene.
- 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
- Which one can not be taken as a unit?