Howdo2singlepolynucleotidestrands join to make double helix?

• How do two single polynucleotide strands join together to make a DNA double helix?

  Single polynucleotide strands are joined by hydrogen bonds

  2 hydrogen bonds form between A and T

  3 hydrogen bonds form between C and G

  The two strands are anti-parallel

  Allows molecule to twist into a double helix structure
• 1. Hydrogen bonds form between the complementary bases o keep the strands together
• 2. 2 H bonds between A and T 3 H bonds between G and C
• 3. The 2 strands are anti-parallel, which allow the molecule to twist into a DNA double helix structure
• How do 2 polynucleotide strands join to make a DNA double helix?

  • Single polynucleotide strands are joined by hydrogen bonds

  2 hydrogen bonds form between A and T

  3 hydrogen bonds form between C and G

  The two strands are anti-parallel

  Allows molecule to twist into a double helix structure