Which of the following is NOT a type of molecular interaction that determines the tertiary structure of a protein?
A. Covalent bonds between purine and pyrimidine bases
B. Covalent bonds between two cysteine amino acids
C. Hydrogen bonds
D. Van der Waals forces
E. Ionic bonds
Answer: A
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A) invert B) evert C) adduct D) protract E) hyperextend
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