is
the essential amino acid?()
A: glycine
B: methionine
C: tyrosine
D: Glutamine
举一反三
- Which one of the<br/>following amino acids can be phosphorylated? () A: Tyrosine B: Alanine C: Aspartate D: Methionine E: Glutamine
- 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 branch amino acids involved in “the hypothesis of plasma amino acid imbalance” include A: Valine, leucine and isoleucine B: Valine, leucine and tyrosine C: Leucine, isoleucine and phenylalanine D: Tyrosine and phenylalanine E: Valine, tyrosine and phenylalanine
- 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
- 必需氨基酸(essential amino acid)
内容
- 0
Which of the following amino acids doesn’t belong to essential amino acids?? Methionine|Isoleucine|Valine|Cysteine
- 1
The spacial conformation of protein is mainly determined by: () A: the<br/>sequence of amino acid B: α-helix<br/>and β-pleated sheets C: the<br/>side chain of amino acid in the peptide D: peptide<br/>bond in the peptide chain E: the<br/>location of disulfide bond in the peptide chain
- 2
What<br/>about inserting a base into the coding region of a gene?() A: No<br/>impact B: It<br/>will change all amino acid sequences of the protein downstream of the<br/>insertion point C: Depending<br/>on the insertion point, it may have different effects on the protein D: An<br/>amino acid will be inserted into the protein sequence E: Three<br/>amino acids will be inserted into the protein sequence
- 3
Carnitine is: A: an essential cofactor for the citric acid cycle. B: essential for intracellular transport of fatty acids. C: one of the amino acids commonly found in protein. D: present only in carnivorous animals.
- 4
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