Exams › JEE Main › Chemistry

The reason for double helical structure of DNA is operation of

1. dipole-dipole interaction
2. hydrogen bonding
3. electrostatic attractions
4. van der Waals' forces

Correct answer: hydrogen bonding

Solution

The double helical structure of DNA is primarily stabilized by hydrogen bonding between complementary nitrogenous bases, which allows the two strands to coil around each other while maintaining the necessary distance and orientation.

Related JEE Main Chemistry questions

• Table sugar is classified as a
• Which pair of compounds will both produce a positive result with Tollens’ reagent?
• The process of breaking down sucrose by hydrolysis is known as
• Identify the statement that is incorrect.
• How many amino acids present in proteins can be produced by the human body itself?
• Amylose is chemically a ________ made up of about 200–1000 α-D-(+)-glucose units joined through ______ glycosidic bonds.

⚔️ Practice JEE Main Chemistry free + battle 1v1 →