Question

The correct statement(s) among the following is/are

• A. Secondary structure of a polypeptide describes the number and type of amino acid residues.
• B. Uracil is a pyrimidine nucleobase.
• C. Natural fatty acids have odd number of carbon atoms.
• D. Reaction of (D)-glucose with Ca(OH)$_2$ gives a product mixture containing (D)-fructose, (D)-mannose, and (D)-glucose.

Hint:

Uracil is a pyrimidine base found in RNA, where it pairs with adenine.

Answer 1

The Correct Option is B, D

Step 1: Understanding the statements.
- (A) The secondary structure of a polypeptide refers to the arrangement of the polypeptide chain in space, such as alpha-helices and beta-pleated sheets. It does not describe the number or type of amino acid residues.
- (B) Uracil is indeed a pyrimidine nucleobase found in RNA.
- (C) Natural fatty acids generally have an even number of carbon atoms, not odd.
- (D) Reaction of (D)-glucose with Ca(OH)$_2$ typically gives a mixture of (D)-glucose and (D)-mannose, but fructose is not typically formed under these conditions.
Step 2: Conclusion.
Thus, the correct statement is (B) Uracil is a pyrimidine nucleobase.