第三章单元测试
- Most of -amino acids are （ ）?
- Which amino acid contains positive charge? （ ）
- Which amino acid is negative charge in water? （ ）
- Isoelectric point is the status of a net charge at （ ） ?
- Essential amino acids do not include （ ） ?
A:nitrogen-independent B:nonpolar C:carbon-independent D:chiral
答案:chiral
A:Tyrosine B:Lysine C:Glycine D:Methionine
A:Glutamate B:Arginine C:Histidine D:Glutamine
A:Positive B:Cation C:Negative D:Zero
A:Lysine B:Threonine C:Proline D:Histidine
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