In a double helix, the two strands of DNA are held together by which type of bond?
Correct Answer: Hydrogen bonds
- Step 1: Understand that DNA has two strands that twist together to form a shape called a double helix.
- Step 2: Know that each strand of DNA is made up of smaller units called nucleotides.
- Step 3: Each nucleotide contains a nitrogenous base, which can be one of four types: adenine (A), thymine (T), cytosine (C), or guanine (G).
- Step 4: Realize that in the double helix, certain bases pair together: adenine pairs with thymine, and cytosine pairs with guanine.
- Step 5: Learn that the connection between these paired bases is made by weak bonds called hydrogen bonds.
- Step 6: Conclude that these hydrogen bonds between the complementary nitrogenous bases are what hold the two strands of the DNA double helix together.
No concepts available.
