Build a segment of the DNA consisting of Adenine, Thymine, Cytosine and Guanine. Color-coded pieces designate certain molecules making up the four nucleotides present in DNA. Kit includes: 12 packets of model parts, each with enough material to construct a segment of 6-paired bases. Instructions and reproducible student worksheets are also included.
Chromosomes are structures in the nucleus of a cell and are composed of long strands of deoxyribonucleic acid (DNA). In 1953, two scientists, James D. Watson and F.H.C. Crick, proposed a model of the structure of the complex DNA. They described the molecule as a double helix or spiral, composed of nucleotides. Each nucleotide is composed of a phosphate unit joined to deoxyribose, a five-carbon sugar and a nitrogen-containing base. The DNA molecule is a double strand of possibly thousands of nucleotides bonded by synthesis in a cell.
12 - 3 prong "deoxyrobose" centers (black)
12 - 2 prong "phosphate" centers (red)
3 - "Adenine" straws (red)
3 - "Guanine" straws (gray)
3 - "Thymine" straws (blue)
1 - 4 prong center
3 - "Cytosine" straws (short green)
6 - Hydrogen bondcenters (white)
24 - connectors (yellow)
1 - long strand (gray)
3 long posts (green)
3 - "Uracil" (white)
Made by American Educational Products
American Educational Products are focused on the early childhood and physical education arena. Teachers, parents and caregivers will find creatively designed products to stimulate children's motor skills, as well as their intellectual development. Many of the products are appropriate for children with special needs/disabilities and ideal for school, home and daycare settings.
SensoryEdge offers free shipping to the lower 48 contiguous states in the USA.
Shipping times are listed on each item page. If you order multiple items, they may arrive separately. Most products are shipped factory direct and thus might be coming from different locations.
The majority of the products we sell are shipped either UPS or Fed Ex ground depending on the vendors preferred delivery service. Large orders and heavy items may be shipped by a 3rd party trucking service. Items shipped via 3rd party trucking do not include lift-gate service or inside delivery.
SensoryEdge wants you to be satisfied with your purchase. We accept returns within 30 days of delivery. Returns must be in their original packaging, unused, and in resalable condition.
To facilitate a return you must e-mail us at email@example.com to receive a return authorization number (RMA). We will provide you with an RMA number and address to send your return. Personalized items cannot be returned.
Items are to be returned at the customer's expense unless damaged during shipping.