The physical and chemical properties shared by proteins and amino acids are:
A. Polymer properties
B. Colloidal properties
C. Amphoteric Dissociation
D. Precipitation properties
E. Denatured properties
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The advanced structure of the protein depends on
A. Hydrogen bonds in protein peptide chains
B. Peptide bonds in protein peptide chains
C. Amino acid composition and sequence in protein peptide chains
D. Peptide bond plane in protein peptide chain
E. Peptide units in protein peptide chains
The main chemical bond that maintains the alpha-helical structure of the protein is
A. peptide bond
B. Hydrogen bonding between peptide bond atoms
C. Hydrogen bonding between side chains
D. Salt key
E. Disulfide bond
The principle of salt precipitation, precipitation of proteins is
A. Binding of proteins to form insoluble protein salt
B. To neutralize the charge and destroy the hydration shell
C. Lowering the dielectric constant of the protein solution
D. Adjust the isoelectric point of the protein solution
E. Denature proteins
五段动词「洗（あら）う」的 “ます形” 是：
A. 洗うます
B. 洗います
C. 洗きます
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