The genome of an organism consists of complementary pairs of enormously long polynucleotides wound around each other in the form of a double helix. Through study, students will know the difference single-stranded and double-stranded, and why the DNA is more stable than RNA. Features - Color: As shown - Material:ABS - Size: About 33.00X11.60X11.60cm/12.97X4.56X4.56in - With great detailing for structure, this model fit wonderfully on desk or shelf, good aid in school. - Vivid to teach students the bio-subjects about, for example, What are the basic units that make up DNA. - The nitrogen bases hold the two strands together, can only pair in a certain way: A pairing with pairing with G. - Good for school teaching tool, learning display and collectibles, also used as a great addition to your labs. - Nice educational your kids assemble independently and encourage imaginative in children. Package list: 4 x