Imagine a ladder, then twist it along it's length. Each side rail forms a helix (screw thread) shape. The alternating sugar-phosphate sequence are the side rails of the ladder the Purine and Pyrimidine Bases (A,G & C,T) are the rungs.
It refers to the DNA molecule that is shaped like a ''twisted ladder'' with the outsides (made of deoxyribose and phoshate) twisted.
DNA forms a double-helix shape - two strands twisting together.
two twisted around each other likea winding stair case. each stairs is made of nucleotides.
a double spirl stair case
DNA is a double helix, or a twisted ladder.
DNA is organized in a double-helix fashion.
helix
DNA is a double helix
nitrogenous bases linked together
DNA, and the shape is also known as a double helix.
double helix
The name of the shape of DNA is called double helix. There are two long strands of DNA connected in several points. These strands twist and look like a spiral or a spring.
A DNA strand is shaped like a 'double helix'.
DNA is a double helix, or a twisted ladder.
DNA is organized in a double-helix fashion.
The twisted ladder shape of DNA is called a double helix.carbohydrate
Double Helix :D
Double helix
DNA exists as a double helix.
The shape of a DNA Molecule is a Double Helix
double helix