Question

Which of the statements about 'Denaturation' given below are correct?
Statements:
(i) Denaturation of proteins causes loss of secondary and tertiary structures of the protein.
(ii) Denaturation leads to the conversion of double strand of DNA into single strand.
(iii) Denaturation affects primary structure which gets destroyed.

• A. (ii) and (iii)
• B. (i) and (iii)
• C. (i) and (ii)
• D. (i), (ii) and (iii)

Answer 1

Answer: (C)

(i) and (ii)

In the process denaturation, secondary and tertiary structures of protein get destroyed but the primary structure remains undisturbed. Since denaturation reactions are not strong enough to break the peptide bonds, the primary structure (sequence of amino acids) remains the same after a denaturation process.

Heat, acid, and alkali denature DNA molecule and a double strand of DNA converts into a single strand.