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Identify the structure of the DNA molecule. What are nucleotides? What makes up a nucleotide? Why is DNA replication said to be semi-conservative? Create a diagram that shows how DNA replication occurs. What is complementary base pairing? Explain why complementary base pairing is necessary to maintain the double helix shape of the DNA molecule.
- RNA
Types of RNA. There are three main types of RNA, all of...
- Chargaff's Rules
We would like to show you a description here but the site...
- RNA
DNA is a double helix structure comprised of nucleotides. A nucleotide, in turn, is made up of phosphate molecule, deoxyribose, and a nitrogenous base. Know the fundamental structure of DNA and the process of DNA replication in this tutorial.
- Step 1: Initiation
- Step 2: Elongation
- Step 3: Termination
Unzipping of DNA DNA replication starts at a particular location on the DNA, called the origin of replication. It is the region where the DNA is unzipped. They have a specific sequence covering about 245 base pairs, mostly A/T base pairs and fewer GT-base pairs. The fewer hydrogen bonds in the AT-rich sequence make the DNA strands separate easily. ...
After the primer is synthesized, DNA polymerase III adds nucleotides with its 5′-phosphate group to the 3′ end of the last nucleotide of the primer. Synthesis of the growing strand in the 5′-to-3′ direction involves adding nucleotides in a complementary order to the template strand. According to the Watson-Crick DNA model, adenine always pairs with...
Removal of RNA Primers by Exonuclease Once the continuous and discontinuous strand synthesis is complete, an exonuclease removes all RNA primers in the lagging strand. They are then replaced with DNA through the activity of DNA polymerase I, the other polymerase involved in the replication. The nicks that remain after the primers are replaced get s...
Nov 2, 2023 · DNA replication is the process of producing two identical copies of DNA from one original DNA molecule. DNA replication is semi-conservative.
- Rajat Thapa
we look closely at the structure and chemistry of DNA in order to learn how its double-helical architecture allows information to be stored, duplicated, and accessed.
Apr 8, 2024 · In this article, we shall discuss the structure of DNA, the steps involved in DNA replication (initiation, elongation and termination) and the clinical consequences that can occur when this process goes wrong.
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Aug 3, 2023 · FIGURE 30.1. The “central dogma” of molecular biology. DNA Structure. Listen. . nked by 3′-to-5′ phosphodiester bonds. With the exception of a few viruses that contain single-stranded DNA (ssDNA), DNA exists as a double-stranded molecule (dsDNA), in which the two strands wind.
