NEET BIOLOGY

Detailed explanation-1: -The phosphate backbone of DNA is negatively charged, which is due to the presence of bonds created between the phosphorus and oxygen atoms. In DNA structure, a phosphate group comprises one negatively charged oxygen atom, which is responsible for the entire strand of DNA to be negatively charged.

Detailed explanation-2: -DNA is a negatively charged polymer that is made up of nucleotide building blocks. Before we discuss where its negative charge comes from, let’s take a close-up view of the nucleotide monomers that make up DNA.

Detailed explanation-3: -Through the process of protein synthesis, DNA regulates the metabolic processes of the cell. Hence, DNA is negatively charged and not positively charged.