Question

question 2
1 pts
select all of the correct statements. (choose all that apply)
nucleotides of a single dna strand are held together by covalent bonds.
complementary strands in a dna molecule are held together by covalent bonds.
nucleotides of a single dna strand are held together by hydrogen bonds.
complementary strands in a dna molecule are held together by hydrogen bonds.
question 3
0.5 pts

Explanation:

• In a single DNA strand, nucleotides are connected by covalent bonds (phosphodiester bonds).
• In a DNA double - helix, complementary strands are held together by hydrogen bonds (A - T has 2 hydrogen bonds, G - C has 3 hydrogen bonds).

Answer:

Nucleotides of a single DNA strand are held together by covalent bonds.
Complementary strands in a DNA molecule are held together by hydrogen bonds.