LIFE SCIENCE

Detailed explanation-1: -A phosphate backbone is the portion of the DNA double helix that provides structural support to the molecule. DNA consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups.

Detailed explanation-2: -What Sugar is in DNA? The sugar found in DNA is called deoxyribose. If it sounds familiar, that’s because it’s not coincidentally the “D” in “DNA” – deoxyribonucleic acid. In terms of chemical structure, deoxyribose is constructed of five carbon, ten hydrogen, and four oxygen (C5H10O4).

Detailed explanation-3: -Explanation: DNA stands for “deoxyribonucleic acid.” The backbone of DNA is comprised of alternating sugar and phosphate units, in which the sugar is deoxyribose. The backbone of RNA is also comprised of sugar and phosphate units, but uses the sugar ribose.

Detailed explanation-4: -The DNA strand’s “backbone” is constituted by pentose sugar and phosphate, while the nitrogenous bases project inside forming the bridges between the strands.