what components make up the backbone of a dna molecule?
what components make up the backbone of a dna molecule?
Answer: The backbone of a DNA molecule is made up of alternating sugar and phosphate molecules. Specifically, the sugar molecule in DNA is deoxyribose, and it is bonded to both a phosphate group and a nitrogenous base.
The phosphate groups form the backbone of the DNA strand through phosphodiester bonds between the 5’ carbon of one sugar molecule and the 3’ carbon of the next sugar molecule. These bonds create a repeating pattern of sugar-phosphate-sugar-phosphate along the length of each DNA strand, with the nitrogenous bases sticking out from the sides of the backbone. The pairing of complementary nitrogenous bases between two DNA strands forms the double helix structure of DNA.
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