Essay On Circular Dna Throws Biologists For A Loop

Cancer, medically called ‘tumorigenesis’ (Thaker, Lutgendorf, & Sood, 2007, p.430) occurs when cells in the body orient themselves for malignant growth. Such cells show ‘self-sufficiency in growth signals’, are ‘insensitive to anti-growth signals’ and have ‘limitless replicative potential’ (Thaker, Lutgendorf, & Sood, 2007, p.430). Once a particular set of cells become malignant, the malignancy can spread to other set of cells in different organs due to ‘crosstalk’ between the affected cells and their surrounding ‘tissues’ and ‘micro-environments’(Thaker, Lutgendorf, & Sood, 2007, p.430).

Cancer is described as the abnormal growth of cells. Normal cells are replaced with abnormal cells in which their deoxyribonucleic acid (DNA) has been damaged or augmented (McCance & Huether, 2014). Cancer cells with their various DNA changes are characterized by growing uncontrollably, being immortal with an unlimited lifespan

Cancer is a multi-step disease that can originate from any cell type, but the majority of human cancers are epithelia-derived carcinomas (Yang and Weinberg 2008). The first step in

Breast Cancer is a type of cancer where in the breast cells growth are uncontrolled. To enhance our understanding of breast cancer, knowing how any cancer can develop is crucial. Cancer develops as a result of the alteration of the genes, or abnormal changes in the genes accountable for managing the growth of the cells and maintaining their health. In each nucleus, the genes operates as the “control room.” The cells in our bodies replace themselves through a process called cell growth in which the

living matter. The ability of a protein to act as part of a structure, or as an

Mutations in this gene are responsible for an increased incidence of melanoma in a very small amount of families. The incidence of melanoma of CDK4 is similar to the families that have mutations in the gene CDKN2A. The gene CDK4 is a proto-oncogene that makes a protein that helps control cell division. However, when the CDK4 gene is mutated, it products an abnormal CDK4 protein that is too active. This abnormal protein makes cell divide uncontrollably fast, which could lead to tumor formation. Clinically, CDK4 and CDKN2A are mostly similar.

Cancer occurs when cells in the human body create irregularities and start to duplicate at anomalous quick rates. The outcome is the development of tumors in or on the surface of the body and organs. Tumors might be generous (not destructive) or threatening (harmful). Since ordinary cell improvement and duplication is a moderate procedure which is well controlled, it is evident when cells duplicate so rapidly.

It was Monday March 17th, 2014 when I received a phone call from my grandma asking me to come visit her. That day is the day when I received the news that my grandma has been diagnosed with invasive lobular carcinoma breast cancer. My grandma and I are very close. Her diagnosis is what persuaded me to write my I- search paper on this specific breast cancer. One topic I am really focusing on when I write my paper is the genetic factors because its important to my family and I. Even though I began to research about the cancer when my grandma was diagnosed, there are still a lot of things I don’t know about and I’m interested to learn about within creating this paper. In this paper I will share with you the importance of invasive lobular

Cancer is a disease caused by an uncontrolled division of abnormal cells. The DNA sequence in cells can be changed as a result of copying errors during replication. If these changes whatever their cause are left uncorrected, both growing and non-growing somatic cells might gain many mutations that they could no longer function. The relevance of DNA damage and repair to the generation of cancer was obvious when it was recognized that everything that causes cancer also cause a change in the DNA sequence. Tumor suppressor genes are protective genes and normally they limit cell growth by monitoring the speed of cell division, repair mismatched DNA and control when a cell dies. When a tumor suppressor gene is mutated cells grow

The Tallahassee Democrat News, a site that is part of the USA Today Network, reports current news on scientific advancements. The article, Fruit Flies Yield Clues On Cancerous Tumor Hotspots, offers an overview of the research done by Yoichiro Tamori, Wu-Min Deng, and Emiko Suzuki, who have discovered that epithelial tissues in fruit flies can be cancerous. The reasoning behind studying fruit flies is because, “Flies and humans have a lot in common in terms of genes and pathways for developing cancer” (Haughney). In the article, the researchers explain that the tumor hot spots, which appear to be near the epithelial tissues, found in fruit flies have also been found in several human cancers, “These tumor hotspots all involved an oncogenic signaling pathway that have been shown to play a part in many types of human cancers” (Haughney). However, the scientists do assure the reader that in distinct areas of the epithelial tissue there are tumor cold spots. Without a doubt, this is the beginning of a prolonged experiment, “The more we know, the better we can get at treating and preventing cancer” (Haughney).

In this research paper, the experimental design was based around the relationship to CCND1 to breast cancer. CCND1 is present during the G1 phase of the mitosis cell cycle. Which occurs right before the S phase. If the CCND1 has a malfunction then the rest of the cell cycle will not finish off correctly into normal functioning cells. The research paper also noted that tumor heterogeneity is a critical issue and there is a hard time treating the tumors because it rejects most of the cell therapy treatments.

“The Emperor of All Maladies” captured the whole essence of cancer. This book gave a very good narrative of the historical record of cancer, the scientists and important public figures who contributed to the fight against a disease that has so much caused despair, pain, disfiguring of the body and worst of all, death. Cancer is seen as the abnormal growth of cells. A normal cell becomes cancerous when there is a defect in the regulation of its growth. Cancerous cells also tend to be elusive and resistant to treatments. Numerous attempts have been channeled into demystifying the nature of cancer. Some of these attempts proved abortive while a few served as a harbinger of hope. Cancer have proved to be part of our genetic makeup, hence, total eradication of it remains a future accomplishment.

DNA replication is described as semi-conservative. It is semi-conservative because the replication of one helix results in two daughter helices each of which contains one of the original parental helical strands. Furthermore, it is semi-conservative because the two new daughter DNA molecules are “half old” and “half new”; this means that half the original DNA molecule is saved, or conserved in the daughter DNA molecules.

Cancer occurrs by the production of multiple mutations in a single cell that causes it to proliferate out of control. Cancer cells often different from their normal neighbors by a host of specific phenotypic changes, such as rapid division rate, invasion of new cellular territories, high metabolic rate, and altered shape. Some of those mutations may be transmitted from the parents through the germ line. Others arise de novo in the somatic cell lineage of a particular cell. Cancer-promoting mutations can be identified in a variety of ways. They can be cloned and studied to learn how they can be controlled.

The process of DNA replication plays a crucial role in providing genetic continuity from one generation to the next. Knowledge of the structure of DNA began with the discovery of nucleic acids in 1869. In 1952, an accurate model of the DNA molecule was presented, thanks to the work of Rosalind Franklin, James Watson, and Francis Crick. To reproduce, a cell must copy and transmit its genetic information (DNA) to all of its progeny. To do so, DNA replicates following the process of semi-conservative replication. Two strands of DNA are obtained from one, having produced two daughter molecules that are identical to one another and to the parent molecule. This essay reviews the three stages