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AP Biology: Viruses Flashcards

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6419495092Virusan infection particle consisting of genes packaged in a protein coat0
6419495093Genetic Material of a Virusdouble-stranded or single stranded DNA or mRNA1
6419495094what do viruses not have/can't dolack machinery/structures found in cells cannot reproduce outside host cell cannot carry out metabolic activities on their own only intracellular parasite2
6419495095parts of viruscapsid: shell genetic material: DNA/RNA some have envelope: surround capsid, comes from membrane of host cell3
6419495096bacteriophagesviruses that infect bacteria almost all have DNA genomes4
6419495098infectionbegins when virus binds to host cell and viral genome enters the cell viral proteins take over host and reprogram cell to copy viral nucleic acids and proteins5
6419495099what does cell provide for virus in infectionprovides: nucleotides amino acids enzymes tRNA host cell provides DNA polymerase but RNA viruses use viral RNA polymerase6
6419495102lytic cyclePhase where the virus is actively replicating and organisms feel "sick"7
6419495104lysogenic cycle-allows replication of genome without destroying the cell -viral DNA integrates with bacterial DNA (called a prophage) -prophage replicates as bacteria does (viral DNA copied within bacteria)8
6419495105prophage-viral DNA incorporated into bacterial DNA -can alter host genotype (may produce toxins such as scarlet fever or healthy vs dangerous E. coli)9
6419495107viral envelopeLipid layer surrounding the virus that is made from the host cell10
6419495109retrovirusesVirus that uses mRNA as its genetic material11
6419495110reverse transcriptaseEnzyme included in the retrovirus capsule that converts the mRNA of the virus into DNA.12
6419495111provirustype of virus that forms when the viral DNA combines with the host DNA in the lysogenic phase13
6419495112viroid and prionsimplified version of a virus that causes inflections14

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