HORTICULTURE

Detailed explanation-1: -Each molecule of DNA is a double helix formed from two complementary strands of nucleotides held together by hydrogen bonds between G-C and A-T base pairs.

Detailed explanation-2: -Molecules called nucleotides, on opposite strands of the DNA double helix, that form chemical bonds with one another. These chemical bonds act like rungs in a ladder and help hold the two strands of DNA together.

Detailed explanation-3: -The two strands of DNA are held together by hydrogen bonds between the paired bases.

Detailed explanation-4: -Each strand of DNA is made of a series of repeating units called nucleotides. Hence, each strand of DNA is referred to as a polynucleotide.