DNA molecule contains 4 bases whose structure are shown below. One of the structure is not correct, identify the…
Biomolecules · Class 12 · JEE Main Previous Year Question
DNA molecule contains 4 bases whose structure are shown below. One of the structure is not correct, identify the incorrect base structure.
- a
Option a
- b
Option b
- c✓
Option c
- d
Option d
Option c
Step 1: Structure Verification — Adenine, Guanine, and Thymine have specific ring systems and substituents defined in biochemistry textbooks.
Step 2: Identifying the Error — Structure (c) typically misrepresents Cytosine or Uracil by omitting a double bond or misplacing an group.
Step 3: Conclusion — Based on the options, structure (c) is the incorrect base structure. Correct option is (c).
Key Point: Visual recognition of the five bases (A, G, C, T, U) is a standard requirement for competitive exams.
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