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Which of the following is true? (a)The disulfide bridges formed by reduction of the sulfhydryl groups on cysteine stabilizes protein tertiary structure

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Which of the following is true?

(a) The disulfide bridges formed by reduction of the sulfhydryl groups on cysteine stabilizes protein tertiary structure

(b) The disulfide bridges formed by oxidation of the sulfhydryl groups on cysteine destabilize protein tertiary structure

(c) The disulfide bridges formed by oxidation of the sulfhydryl groups on cysteine stabilizes protein tertiary structure

(d) The disulfide bridges formed by reduction of the sulfhydryl groups on cysteine destabilize protein tertiary structure

This question was addressed to me during an online exam.

Enquiry is from Tricky Questions and Answers topic in section Regulation of Gene Expression and Miscellaneous of Biochemistry

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The correct choice is (c) The disulfide bridges formed by oxidation of the sulfhydryl groups on cysteine stabilizes protein tertiary structure

Explanation: The disulfide bridge formed by oxidation of the sulfhydryl groups on cysteine stabilizes protein tertiary structure, allowing different parts of the protein chain to be held together covalently.

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