Question

Among the following, the correct statement(s) is/are

• A. Guanine is a purine nucleobase
• B. Glycine and proline are achiral amino acids
• C. DNA contains glycosidic bonds and pentose sugars
• D. Sucrose is a non-reducing sugar

Hint:

A simple way to remember: Purines = adenine & guanine; sucrose = non-reducing sugar.

Answer 1

The Correct Option is A, C, D

Step 1: Evaluate each statement.
(A) Guanine is a purine → correct.
(B) Only glycine is achiral; proline is chiral → incorrect.
(C) DNA has β-glycosidic bonds connecting nitrogenous base and deoxyribose sugar → correct.
(D) Sucrose is non-reducing because both anomeric carbons are involved in glycosidic linkage → correct.
Step 2: Conclusion.
Thus, the correct statements are (A), (C), and (D).