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Provirus

Pearson Ch. 19 - Viruses

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Biology
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Virology
Virus
Bacteriophage
Lytic cycle
RNA virus
Provirus
Lysogenic cycle
DNA virus
Prophage
Viral evolution
Viral envelope
Retrovirus

Ch 19: Viruses Overview: A Borrowed Life Viruses called bacteriophages can infect and set in motion a genetic takeover of bacteria, such as Escherichia coli Viruses lead ?a kind of borrowed life? between life-forms and chemicals The origins of molecular biology lie in early studies of viruses that infect bacteria Concept 19.1: A virus consists of a nucleic acid surrounded by a protein coat The Discovery of Viruses: Scientific Inquiry Tobacco mosaic disease stunts growth of tobacco plants and gives their leaves a mosaic coloration In the late 1800s, researchers hypothesized that a particle smaller than bacteria caused the disease In 1935, Wendell Stanley confirmed this hypothesis by crystallizing the infectious particle,now known as tobacco mosaic virus (TMV)

AP Biology Chapter 19 Notes Campbell/Reece

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Biology
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Biology
Virology
Molecular biology
Bacteriophages
microbiology
Virus
Lytic cycle
RNA virus
Provirus
Retrovirus
Antiviral drug
Orthomyxoviridae
health

AP Biology ? Chapter 19 Viruses ? Overview: A Borrowed Life ? Viruses:???????? Basically just genes packaged in protein coats. ??????????????????????? They lack the structures and metabolic machinery found in cells ? ? Are viruses living or nonlinving? -??????????? They cannot reproduce or carry out metabolic activities outside of a host cell ? so they are kind of between living and non-living (hence ?A borrowed life?. ? ? A lot of what we know about molecular biology comes from the study of viruses ? a lot of the information about genes and nucleic acids. ? ??????????? The ability to manipulate genes and transfer them comes from the study of viruses ??????????? Viruses are used as the agents of gene transfer in gene therapy. ? ? ? ?

Chapter 19 Viruses

Subject: 
Biology
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Biology
Bacteriophages
microbiology
Virology
Molecular biology
Caudovirales
Lytic cycle
Virus
Lysogenic cycle
Provirus
Prophage
RNA virus
health

Viruses Chapter 19 Wow Are they alive???? Viruses are little more than genes packed into protein coats They lack the structures and metabolic activity found in most cells But they infect a host Cause a variety of diseases And can kill So it would be better to say they are in a nebulous state Not alive, not dead But instead living a borrowed life Structure Unlike bacteria Viruses cannot be cultured in media They need a host Not just nutrients The first isolated virus Was Tobacco Mosaic Virus Many viruses are smaller than a ribosome Millions can fit on a pin head Many viruses do not have the typical genome They can have double stranded DNA Single stranded DNA Single stranded RNA Double stranded RNA Can be called a DNA or RNA virus Depending on what it has
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