Primary structure of protein
A. Is the basis of spatial structure
B. refers to amino acid sequence
C. It does not include disulfide bond
D. It mainly depends on peptide bond to maintain stability
E. α-helix and β-sheet are the major conformations of it
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Protein denaturation is because
A. Hydrogen bond is destroyed
B. Peptide bond cleavage
C. Subunit depolymerization
D. The hydration membrane is destroyed and the charge is neutralized
E. Disulfide bond cleavage
The properties of denatured proteins are
A. Solubility drops significantly
B. Loss of biological activity
C. Easy to be hydrolyzed by protease
D. Solidification
E. precipitation
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
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
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