Dna Replication And The Cell Cycle - 1226 Words

Have you ever fell while riding a bicycle? Bobby was riding on his bike down a slope hill when he suddenly loses control of the bike and runs into a tree. Ow! Bobby falls down his bike and onto the ground, scraping his knee. About a week later, Bobby’s skin is pretty much healed up. How? How did Bobby’s wound heal? When you get a cut in your skin, your skin cells divide to replace the ones that died from the injury. An important part of the division of cells is DNA replication. Without DNA replication, the new cells wouldn’t have DNA. So why is DNA so important? DNA is the basic blueprint of life, and it serves to tell the cells what to do, and what proteins to code for. Let’s take a deeper look into Bobby’s cell to see what fascinating events happens during DNA replication. DNA Replication The Cell Cycle Before Bobby’s cells enter the the stage of mitosis to divide, it goes through DNA replication. This process occurs in the nucleus of the cell during the â€Å"S† phase of the interphase of the cell cycle. The process of DNA replication is important in that it is the instruction manual found in every cell that serves to regulate your body and its functions. For example, if tells your cells which proteins to code for. DNA is replicated so that it can be passed into the daughter cells at the end of mitosis. Replication Forks and Bubbles First, let’s understand where DNA replication is happening along the DNA. The whole region of unwound DNA is called theShow MoreRelatedThe Cell Cycle And Dna Replication1690 Words   |  7 Pagesprocesses, with which a cell passes this DNA sequence onto other cells, are DNA replication and mitosis. The cell cycle is inclusive of mitosis and DNA replication, the latter of which occurs in the S phase (synthesis) of the cycle. The goal of the S phase is to create two identical semi-conservative chromosomes. The enzyme helicase unwinds the parental DNA double helix strand and uses it as a template so the enzyme DNA polymerase can attach free-floating nucleotides to the separate DNA ‘daughter’ strandsRead MoreDna And Sequence Of Dna Essay1609 Words   |  7 Pages DNA (deoxyribonucleic acid) is a self-replicating nucleic acid that carries the genetic information in cells in a double helix structure. The 2 stranded helix is composed of 4 nucleotides, Adenine (A), Thymine (T), Guanine (G), and Cytosine (C). The base pairs only form between A and T connected by 2 Hydrogen bonds and G and C connected by 3 hydrogen bonds. Foremost DNA wrapping comes about as DNA wraps around protein called histones. These combined loops of DNA and protein are called nucleosomesRead MoreThe Phases of the Cell Cycle Essay examples569 Words   |  3 PagesThere are four stages when it comes to the stages if the cell cycle. These sections are: G1 which stands for GAP 1 taking approximately 5-6 hours , S phase for synthesis taking approximately 10-12 hours, roughly half the cell cycle time, G2 meaning GAP 2 taking approximately 4-6 hours , and M for mitosis which can take a hour or less. Mitosis is broken down even further into four more phases in itself. These phases of mitosis in order create the acronym PMAT. The four phases of mitosis are: the prophaseRead MoreBiology: Cell Division Cycle Essay1583 Words   |  7 Pagesbiology and in particular cell-division cycle. All organisms are constantly dividing and growing throughout their life time. The cell-division cycle in eukaryotes is a complex process that involves cyclins, cdks and multiple checkpoints that eventually lead to cell division. There are two different types of cell division which are Meiosis and Mitosis. Meiosis is the type of cell division which involves gametes or sex cells that are involved in sexual reproduction. This type cell division produces 4 differentRead More Review of Research Paper on the Interphase of Mitosis1279 Words   |  6 PagesIntroduction The eukaryotic cell cycle, mitosis, is a succession of events that occur for the reproduction and growth of these multi-cellular organisms. Characteristic events in mitosis can divide the cell cycle into different stages, or phases. This paper focuses on the interphase of cell cycle, which is when DNA replication occurs, and the cell is engaged in metabolic activities to prepare itself for cell division. The idea that these two processes are related arises much controversy in whatRead MoreEssay about The Question of Biology is Why?1518 Words   |  7 Pageswill be analyzing two very different processes: DNA Replication and the Polymerase Chain Reaction (PCR). It is that each of these individual processes carries much importance. DNA replication is important in the life of a cell, more so the division, because when a cell divides both of the daughter cells need identical DNA to function properly. PCR is important in that it allows amplification of DNA and isolation of DNA. PCR is als o used to analyze DNA samples (used widely in crime scene investigationRead MoreThe Molecular Carrier Of Genetic Information1213 Words   |  5 PagesMaia Regman Ms. Sherwood AP Biology 29 January 2015 Question One Because on the work of all of the scientists cited below, DNA can be identified as the molecular carrier of genetic information. By knowing DNA carries genetic information, and not proteins, by knowing DNA’s structure, and knowing DNA is the transforming principle, DNA has become the basis of genetic research and its study has advanced biological and medical science. Alfred Hershey and Martha Chase used experiments involving a T2 bacteriophageRead MoreDNA Complications In Biology916 Words   |  4 PagesOther proteins unwind the template DNA and stabilize single-stranded regions: Helicases unwind the two strands of parental DNA ahead of the replication fork. Single-stranded DNA-binding proteins then stabilize the unwound template DNA, keeping it in an extended single-stranded state so that it serve as templates for new DNA synthesis. Single-stranded DNA-binding proteins (SSB) have high affinity to single-stranded (ss) DNA and participate in DNA replication, recombination, and repair as accessoryRead MoreViruses Are Parasites Using Its Host s Cells1726 Words   |  7 Pagess cells to replicate its own genome (Freeman, 2011). Viruses have either a deoxyribonucleic acid (DNA) or ribonucleic acid (RNA) genome that affects its specific named genome. Types of RNA viruses include positive strand, negative strand, double strand and RNA transcriptase. RNA viruses have evolved into effective pathogens that mutate at high rates. This allows them an advantage over their host to effectively evade the immune system through several mechanisms, such as mimicry, avoiding cell lysisRead MoreA Change Of A Chromosome Number1582 Words   |  7 Pagesalters chromosome number but not the DNA sequence. Between 75 and 90% of human tumors are aneuploid showing that this condition leads to cancer (Holland and Cleveland, 2009; Schvartzman et al, 2010). In humans it leads to miscarriage and congenital birth defects. A correlation has been found recently between alterations in genetic material and gene transcription. â€Å"Comprehensive whole-genome gene expression and the entire complements of proteins that’s expressed by a cell, tissue or an organism revealed