PPT-RNA VIRUS REPLICATION/ TRNSLATION STRATEGIES

Sadia Anjum Virology lecture 5 1 RNA VIRUS STRATEGIES 2 RNA gt RNA RNAdependent RNA polymerase RNA gt DNA RNAdependent DNA polymerase reverse transcriptase Host cell DNA gt RNA. Viruses Are Not Cells!. There are several structural and functional differences between cells and viruses. The structural differences include:. No nucleus. No cell membrane. No organelles. The functional differences include:. Dalya. Basil. Antiviral Chemotherapy . (Prevention and Treatment of Viral Infection). Viruses are a leading cause of disease and death worldwide. Although public health measures and vaccines are the most effective ways to control many viral infections, preventive measures have not succeeded for numerous viral diseases. For some of these diseases, antiviral drugs have been developed.. 8.1 What Is a Virus? Plus 9.1, 9.2 (parts). 8.2 Structure of the Virion. 8.3 Overview of the Virus Life Cycle. 8.8 . Temperate Bacteriophages and . Lysogeny. 8.10, 9.6, 9.7 Overview of Animal Viruses. Virus Characteristics. A virus is an infectious agent found in virtually all life forms.. Viruses consist of genetic material, and have a central core either DNA nor RNA. Although they are infectious agents, they differ from bacteria in that they contain . . The genome . of the infecting virus is replicated so that . viral transcription . can be amplified and to provide copies . of the . genome for progeny . virions. .. Generally, DNA viruses copy their genomes . A virus must use cell processes to replicate. The viral replication cycle can produce dramatic biochemical and structural changes in the host cell, which may cause cell damage. These changes, called cytopathic (causing cell damage) effects, can change cell functions or even destroy the cell. Some infected cells, such as those infected by the common cold virus known as rhinovirus, die through. In . their 1953 announcement of a double helix structure for DNA, Watson and Crick stated, . "It has not escaped our notice that the specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material.". Carcinogenesis. Carcinogenesis or . Oncogenesis. =. creation of cancer= normal cells are transformed into cancer cells= characterized by . a progression of changes on cellular and genetic level . that ultimately reprogram a cell to undergo uncontrolled cell division, thus forming a malignant mass.. Dalya. Basil Hanna. Paramyxoviridae. a. Measles – . rubeola. b. Mumps. c. . Parainfluenza. d. RSV – respiratory . syncytial. virus. Paramyxoviruses. All members of the . Paramyxoviridae. family initiate infection via the respiratory tract. Replication of the respiratory pathogens is limited to the respiratory epithelia, whereas measles and mumps become disseminated throughout the body and produce generalized disease.. Plafue Virus Adapted to Human Epithelial Tumor Cells and Human Myeloblasts in vitro Replication in Human Leukemic Myeloblast Cultures different passage levels of an avian strain of influenza A (see p Ori. Disclaimer. The information represents my understanding only so errors and omissions are probably rampant. It has not been vetted or reviewed by faculty. The source is our class notes.. The document can mostly be used forward and backward. I tried to mark questionable stuff with (?). . Dept. of Biology, 2. nd. year, 2020. Mustansiriyah. University. References:. Virology: principles and applications, John Carter and Venetia Saunders, 2013.. Principles of Molecular Virology, Alan, J. . Introduction:. Viral infections of plants can cause necrosis, hypoplasia . or . hyperplasia and these effects can lead to symptoms such as. Growth retardation . Distortion. Mosaic patterning of leaves. Classification. Family. - . Asfarviridae. Genus. - . Asfivirus. Species . - African swine fever virus. Arbovirus (transmitted by ticks) . Only arbovirus that contains DNA.. Single serotype. Viral Characteristics.