This section is dedicated to challenging and conceptually demanding problems based on the structure of DNA and RNA. It is designed for advanced Class 11–12 students, NEET aspirants targeting top ranks, and undergraduate learners who want to rigorously test and strengthen their depth of molecular understanding.
In this section, you will work on:
High-level MCQs requiring close NCERT line interpretation
Multi-concept problems involving nucleotide structure and base pairing
Assertion–reason and multi-statement questions
Analytical problems on DNA stability, hydrogen bonding, and helix structure
Complex questions on structural variants of DNA (A, B, and Z forms)
Reasoning-based problems linking RNA structure with function
Diagram-based and interpretation-heavy competitive questions
The content is structured to enhance analytical thinking, improve accuracy under pressure, and prepare students to handle the toughest questions in NEET and other competitive examinations.
Sharpen your reasoning skills and master complexity by practicing higher-difficulty problems on the structure of DNA and RNA.
Q. In which phase of the cell cycle does DNA replication occur?
A.
G1 phase
B.
S phase
C.
G2 phase
D.
M phase
Solution
DNA replication occurs during the S phase of the cell cycle.
