Question

dna basics fill in the blanks... in dna, the phosphate and sugar molecules form the ________ of two strands. the strands are joined together by ______ bonds that connect nucleotides. adenine always bonds to ______ and cytosine always bonds to ______. the whole molecule is coiled like a twisted ______, or double ________.

Explanation:

In DNA, phosphate - sugar form backbones. Strands are joined by hydrogen bonds. Adenine bonds with thymine and cytosine with guanine. The DNA molecule is coiled as a helix.

Answer:

1. backbones
2. hydrogen
3. thymine
4. guanine
5. ladder
6. helix