Question

How are the two strands of DNA held together in the double helical structure?

Question 12 options:



Hydrogen bonds between nitrogenous bases




Hydrogen bonds between phosphate groups




Covalent bonds between phosphate groups




Covalent bonds between nitrogenous bases

Answer 1

hydrogen bonds between nitrogenous bases

Step-by-step explanation:

In Watson and Crick's model, the two strands of the DNA double helix are held together by hydrogen bonds between nitrogenous bases on opposite strands.