第一章 单元测试
1、
At the isoelectric point, the net charge of the protein molecule is 0.
A:对
B:错
答案: 对
2、
All the proteins have quaternary structure.
A:对
B:错
答案: 错
3、
The principle of salt precipitation, precipitation of proteins is ( )
A:Binding of proteins to form insoluble protein salt
B:To neutralize the charge and destr