About Tac Light. Tac Light is a small-but-powerful flashlight by Bell & Howell that has been advertised on television in 2016. The official product website is trytaclight.com, which was registered in April 2016. The screenshot below was taken of the official website in May 2016. 22 times brighter than regular flashlights (600 lumens)
However, only four bases: A (adenine), C (cytosine), G (guanine), and T (thymine) constitute the backbone of the molecule. The DNA molecule is made up of two polynucleotide strands intertwined together to form a long helical structure, the DNA double helix.
(note that the carbons in deoxyribose are numbered). 2. DNA is double stranded (ds), meaning there are two of the above strands together. Try to assemble a ds DNA molecule with sugar phosphate backbones on the outside, and nitrogen bases on the inside.here are two sugars found in nucleic acids; ribose is found in RNA (r ibo n ucleic a cid) and deoxyribose in DNA. Deoxyribose refers to the fact that one of the hydroxyl (OH) groups is missing from this sugar. Examine the two sugars below. Identify which is ribose and which is deoxyribose.