A double helix is often referred to as a "twisted ladder." It consists of two spirals bound together.
It's the shape of the DNA molecule, a pair of parallel helices intertwined about a common axis.
DNA is double stranded while RNA only has one strand.
DIFFERENCE BETWEEN DNA AND RNA IN HELIX: DNA is double stranded whereas RNA is single stranded. DNA has sugar ribose and RNA has deoxyribose. DNA has base thymine and RNA has uracil
like the computer single helix is 1g ram double helix like 2g ram so double helix more stable