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Viral_Genetics - Viral Genetics Additional Material to Know...

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Viral Genetics Additional Material to Know for Test Day!
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Viruses and types The PCAT often asks about viruses and how they infect cells, such as bacteria. Let’s cover some key aspects of those creatures: Viruses cannot replicate on their own; they need a host cell. There are 3 basic types of viruses.
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DNA-Containing Viruses Injection of genetic material into a cell *DNA can go directly into the host cell’s nucleus. Host cell makes viral RNA; ultimately making proteins necessary for new viruses. Some of these virus types carry out replication in the cytoplasm instead and must bring their own machinery.
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RNA-Containing Viruses Since host cells do not replicate RNA, these types of viruses must bring RNA Replicase Retroviruses create DNA from their RNA with an enzyme called reverse transcriptase . This enzyme opposes normal transcription and afterwards the viral DNA is incorporated into the host’s genome.
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