Removal of which following group produces more active deadenylylated glutamine synthetase, and glutamine is formed？ A: acetyl B: phosphoryl C: methyl D: adenylyl

Whichone<br/>is<br/>the essential amino acid?() A: glycine B: methionine C: tyrosine D: Glutamine

The form transporting and storing ammonia in the body is (    ).  A: glutamate B: glutamine C: glutathione D: glycine E: urea

Which one of the<br/>following amino acids can be phosphorylated? () A: Tyrosine B: Alanine C: Aspartate D: Methionine E: Glutamine

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 one of the following amino acids in the protein does NOT have<br/>its genetic codon? ( ) A: Methionine B: Hydroxyproline C: Tryptophan D: Glutamine

The main cause of inadequate ammonia clearance at severe hepatic dysfunction is ( ) A: Impairment of glutamine synthesis B: Impairment of urea synthesis C: Impairment of acetylcholine synthesis D: Impairment of glutamic acid synthesis E: Impairment of γ-aminobutyric acid synthesis

腺苷化谷氨酰胺合成酶adenylylated glutamine synthetase经过脱去以下那种基团能够提高活性，从而生成谷氨酰胺？? acetyl 乙酰基|adenylyl;腺苷酰基团|phosphoryl 磷酰基|methyl 甲基