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In 3° structure of proteins, folding and shaping is done by __________

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In 3° structure of proteins, folding and shaping is done by __________

(a) Hydrophobic interactions

(b) Polar interactions

(c) Hydrogen bonding

(d) None of the mentioned

I have been asked this question in homework.

My question is from The Covalent Structure of Proteins in portion Amino Acids, Peptides and Proteins of Biochemistry

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The correct choice is (a) Hydrophobic interactions

The explanation: Globular proteins have a tertiary structure with hydrophobic amino acid residues and a surface region of hydrophilic residues; these hydrophobic interactions are responsible for the folding and shaping of 3° structure of proteins.

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