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The correct statements are: A. Activation energy for enzyme catalysed hydrolysis of sucrose is lower than that of acid catalysed hydrolysis. B. During denaturation, secondary and tertiary structures of a protein are destroyed but primary structure remains intact. C. Nucleotides are joined together by glycosidic linkage between C1 and C4 carbons of the pentose sugar D. Quaternary structure of proteins represents overall folding of the polypeptide chain. Choose the correct answer from the options given below:

1. A, C and D Only
2. A, B and D Only
3. A and B Only
4. B and C Only

Correct answer: A and B Only

Solution

Options A and B are correct because enzyme catalysis typically lowers the activation energy compared to acid catalysis, and during denaturation, the secondary and tertiary structures of proteins are disrupted while the primary structure, which is the sequence of amino acids, remains unchanged.

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