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. General description. Viruses is not living organism, as they lack two essential properties of life- they cannot . replicate. independently, and cannot . survive. long –term independently so it is obligate intracellular organism .. SC.L.16.3 . Describe . the basic process. of . DNA replication . and how it relates . to the . transmission . and . conservation. of . the genetic information. DNA and Its structure. DNA (deoxyribonucleic acid) is a large organic. 20.1 part 2. DNA replication. Earlier on in this unit we learned about mitosis or cell division.. In order for mitosis to occur and chromosomes to duplicate themselves, the DNA must copy itself exactly.. 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:. Models of DNA replication: Meselson-Stahl Experiment. DNA synthesis and elongation. DNA polymerases. Origin and initiation of DNA replication. Prokaryote/eukaryote models (circular/linear chromosomes). Elliot J. Lefkowitz. Email. ElliotL@uab.edu. Web Site. http://www.genome.uab.edu. Office. BBRB 277A. Phone. 934-1946. Contact Information: Elliot Lefkowitz, Ph.D.. Associate Professor, Microbiology. Objectives. Chapters 16 and 17. Before the end of the semester we will be covering…. Historical DNA experiments. Structure of DNA/RNA. DNA Replication. Protein Synthesis (Transcription and Translation). Mutations. BIO…. LIFE….. THINK ABOUT THIS: . What do we do in our lifetime?. What are the major stages of our life?. What are the Major stages of physical development in our lives?. What would it look like. 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.". Honors Biology. Mrs. Sims. Let’s Start with a Video. Please view the video before you start this presentation. . DNA Replication Animation. **This animation is created by McGraw Hill, the publisher of your textbook.. chromosome. Presented . by. Pallavi. . Mohite. Assistant Professor. Department . of . Biotechnology. Deogiri . College, Aurangabad. Outline. Requirements. Mechanism. Pallavi. . Mohite. Asst. Prof. . 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. . Viruses are very small – smaller than the smallest cell.. They are usually surrounded by a capsid of proteins.. For replication, viruses rely on their host cells . ie. ., the cells they infect.. Most viruses exhibit a limited host range- they typically infect only specific types of cells of one host species..