How many strands does a double-stranded helix of DNA have?

A double-stranded helix of DNA consists of two strands that wind around each other, forming a structure commonly referred to as the double helix. Each strand is made up of a backbone of sugar and phosphate groups, with attached nitrogenous bases that pair specifically across the two strands—adenine with thymine, and cytosine with guanine. This complementary base pairing is crucial for the replication of DNA and for the accurate transmission of genetic information. The double-stranded nature allows DNA to be stable and protected, enabling it to perform its essential functions in living organisms.