NEET Botany DNA Structure MCQ Question
Consider a diagram of a DNA double helix with labels pointing to the backbone and the base pairs. Which of the following correctly describes the structure and stabilizing interactions shown in the DNA molecule?
The sugar-phosphate backbone holds the structure together, and base pair stacking provides stability.
The nitrogenous bases form a backbone, and hydrogen bonds stabilize the structure.
The sugar-phosphate backbone and nitrogenous bases both provide structural stability.
Hydrogen bonds form the backbone, while phosphate groups stack the bases for stability.
Correct Answer
Detailed Explanation
The DNA double helix is stabilized by the sugar-phosphate backbone, while the stacking of base pairs and hydrogen bonds between them confer structural stability, as mentioned in the NCERT context.
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