![]() ![]() It has a hydroxyl (-OH) group linked to the 2 carbon and a. One of the building blocks of nucleotides in DNA is a sugar molecule called deoxyribose. I know this is a lot to take in, but there are several videos and articles on Khan Academy to help. The three parts of a nucleotide in the ladder model of DNA are: a sugar molecule, a nitrogen-containing base, and a phosphate group. DNA is a complete set of instructions needed for life (unless you're a virus, but that's a whole different story/debate) and RNA is used to copy DNA and to synthesize proteins. (It takes two bases to form a rung - one for each side of the ladder.) A sugar molecule, a base, and a phosphate. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. ![]() DNA consists of two strands that wind around each other like a twisted ladder. The adenine (A)-thymine (T) base pair is connected by two hydrogen bonds, and cytosine (C)-guanine (G), three. A phosphate backbone is the portion of the DNA double helix that provides structural support to the molecule. DNA turns once typically every 10.4 pairs, and the distance between the center of nucleotide pairs is about 3.4nm. RNA is single-stranded and is generally straight. These bases are the rungs of the DNA ladder. The sugar-phosphate backbone is on the outside of the molecule, giving it a negative charge. Uracil links to adenine in RNA just like thymine does in DNAįinally, DNA is double-stranded and forms a double helix structure. Thymine had the chemical formula C5H6N2O2 and uracil is C4H4N2O2. Instead, it has uracil, a nucleiotide base with a slightly different chemical makeup. You probably know that DNA has guanine, cytosine, adenine, and thymine, and that guanine links to cytosine and adenine links to thymine. Second, while each has four nucleiotide bases, there is one difference. These names describe the sugar that makes up their backbone-DNA = deoxyribose and RNA = ribose. To start, DNA stands for deoxyribonucleic acid, while RNA stands for ribonucleic acid. The base binds to the sugars carbon creating a three-part molecule called nucleotides. I will answer you the way I have answered this question before with other users. The sugar and phosphates bind to each other in covalent bonds. ![]()
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