Search results
Sep 24, 2018 · Nucleotides in DNA have a single phosphate, but free nucleotides can have two or three (and sometimes more) phosphate groups. Nucleotides bearing three phosphates at the 5’
If you followed the left-hand chain to its very end at the top, you would have a phosphate group attached to the 5' carbon in the deoxyribose ring. If you followed it all the way to the other end, you would have an -OH group attached to the 3' carbon.
DNA is made of four types of nucleotides, which are linked covalently into a polynucleotide chain (a DNA strand) with a sugar-phosphate backbone from which the bases (A, C, G, and T) extend. A DNA molecule is composed of two (more...) The way in which the nucleotide subunits are lined together gives a DNA strand a chemical polarity.
- Bruce Alberts, Alexander Johnson, Julian Lewis, Martin Raff, Keith Roberts, Peter Walter
- 2002
- 2002
To make a model of DNA, you need to ascertain (1) how many chains of DNA are present in the biological form of DNA, and, if more than one chain, (2) whether those chains run in the same or opposite directions, (3) whether they pack straight or twist around one another, and (4) how the chains interact.
Oct 31, 2023 · DNA has a double-helix structure, with sugar and phosphate on the outside of the helix, forming the sugar-phosphate backbone of the DNA. The nitrogenous bases are stacked in the interior in pairs, like the steps of a staircase; the pairs are bound to each other by hydrogen bonds.
Aug 4, 2022 · Phoshpodiester bond is present between the 5’-hydroxyl group and the 3’-hydroxyl group of the deoxypentose of the nucleotides. The phosphate group joins these hydroxyl groups in the adjacent nucleotides. In the DNA, the sequences are encoded in the 5′ end to the 3′ end of the chain. E.g., 5’-ATGC-3′.
People also ask
What is a polynucleotide chain?
What is the structure of DNA?
Which structure is responsible for maintaining the shape of the nucleic acid?
What are the three dimensional features of a polynucleotide chain?
What are the 4 bases in DNA?
How many base pairs does a DNA molecule have?
Dec 30, 2022 · 1. DNA. Deoxyribonucleic acid is a polymer chain of nucleotides connected by 5’ to 3’ phosphodiester bonds. DNA normally exists as a two antiparallel complementary strands held together by hydrogen bonds between adenines (A) and thymines (T), and between guanines (G) and cytosines (C).
