DNA Model Kit

DNA Model Kit

This molecular model kit of DNA is really two kits in one. First, it allows students to build a Watson-Crick model of an 8-rung ladder section of DNA, with colored pieces representing the four nucleic acids, hydrogen bonds, phosphates, and deoxyribose sugars. Cell Anatomy: Cells are "building blocks" of life: all living things, whether plants, animals, people, or tiny microscopic organisms, are made up of cells. Although a cell is only about 10 micrometers across (one micrometer=one millionth of a meter!), there is still amazing complexity within it.

Our staff works hard to make the DNA Identity Testing Center your choice of provider for all DNA testing services. We ensure superior quality, service and convenience to our clients. In our commitment to providing convenience, please know that we provide a free DNASwabTM Home DNA Collection Kit for use in all types of private DNA tests.

Vacuoles
Vacuoles
Vacuoles are the cell's main storage units, holding food, water, or waste until it can be used or disposed of. Mitochondria are the "powerhouses" of the cell, converting nutrients to energy. Animal cells contain lysosomes that are responsible for the reactions that break down proteins, poly- and disaccharides, and some lipids. Your white blood cells use lysosomes to "eat" disease with digestive enzymes.
Double Stranded DNA Test
Double Stranded DNA Test
In Molecular Biology, the double helix refers to the structure of DNA. The DNA double helix is a right-handed spiral polymer of nucleic acids, held together by nucleotides which base pair together. A single turn of the helix constitutes ten nucleotides. The double helix structure of DNA contains a major groove and minor groove, the major groove being wider than the minor groove. Given the difference in widths of the major groove and minor groove, many proteins which bind to DNA do so through the wider major groove
Double-Stranded Helical Model
The easiest way to visualize DNA is as an immensely long rope ladder, twisted into a cork-screw shape. The sides of the ladder are alternating sequences of deoxyribose and phosphate (backbone) while the rungs of the ladder (bases) are made in two parts with each part firmly attached to the side of the ladder.
Alternative Double-Helical Structures
DNA exists in many possible conformations. However, only A-DNA, B-DNA, and Z-DNA have been observed in organisms. Which conformation DNA adopts depends on the sequence of the DNA, the amount and direction of supercoiling, chemical modifications of the bases and also solution conditions, such as the concentration of metal ions and polyamines. Of these three conformations, the "B" form described above is most common under the conditions found in cells. The two alternative double-helical forms of DNA differ in their geometry and dimensions.
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