6419495092 | Virus | an infection particle consisting of genes packaged in a protein coat | 0 | |
6419495093 | Genetic Material of a Virus | double-stranded or single stranded DNA or mRNA | 1 | |
6419495094 | what do viruses not have/can't do | lack machinery/structures found in cells cannot reproduce outside host cell cannot carry out metabolic activities on their own only intracellular parasite | 2 | |
6419495095 | parts of virus | capsid: shell genetic material: DNA/RNA some have envelope: surround capsid, comes from membrane of host cell | 3 | |
6419495096 | bacteriophages | viruses that infect bacteria almost all have DNA genomes | 4 | |
6419495098 | infection | begins 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 proteins | 5 | |
6419495099 | what does cell provide for virus in infection | provides: nucleotides amino acids enzymes tRNA host cell provides DNA polymerase but RNA viruses use viral RNA polymerase | 6 | |
6419495102 | lytic cycle | Phase where the virus is actively replicating and organisms feel "sick" | ![]() | 7 |
6419495104 | lysogenic 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 | |
6419495105 | prophage | -viral DNA incorporated into bacterial DNA -can alter host genotype (may produce toxins such as scarlet fever or healthy vs dangerous E. coli) | 9 | |
6419495107 | viral envelope | Lipid layer surrounding the virus that is made from the host cell | 10 | |
6419495109 | retroviruses | Virus that uses mRNA as its genetic material | 11 | |
6419495110 | reverse transcriptase | Enzyme included in the retrovirus capsule that converts the mRNA of the virus into DNA. | 12 | |
6419495111 | provirus | type of virus that forms when the viral DNA combines with the host DNA in the lysogenic phase | 13 | |
6419495112 | viroid and prion | simplified version of a virus that causes inflections | 14 |
AP Biology: Viruses Flashcards
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