tasnimjaisee's version from 2015-06-20 22:05


Question Answer
Virulent When a virus causes a disease
TemperateWhen a virus does not causes a disease immediately
VirusBiological particle composed of genetic material & protein. Made of DNA or RNA and a protein coat, capsid
Virus ReproductionInvading a host cell; using enzymes and organelles of it to produce
Obligate Intercellular ParasitesRequires a host cell to reproduce
Reverse Transcriptase Found in retroviruses (AIDS), an enzyme which makes DNA from RNA
PathogenDisease causing agent
ViroidSingle stranded RNA with no capsid; causes disease in plants spread through pollen/seeds
PrionOnly made of proteins; causes misfolds in proteins resulting in brain conditions
Virus StructureGenetic material, capsid, lipid envelope
Virus' Ways to Enter Cell Bacteriophages pierce host cell, eukaryotes enter by endocytosis & by fusing with membrane
Lytic CycleVirulent virus cycle; Absorption, Entry, Replication, Assembly, Release
Lysogenic CycleTemperate virus cycle; Absorption, Entry, Prophage, External Stimuli, Replication, Assembly, Release
TransductionVirus transfers DNA from cell to cell and causes change in genetic code of the bacterial cells
Virulence Ability of pathogen to cause disease
Immunityhost's ability to overcome the virus. May be natural or may aquire immunity during lifetime. Body produces atribodies to destro alien substances
InterferonNaturally signaling proteins made by immune system to fight off viruses by limiting viral reporoduction & increasing work of lymphocytes
Vaccinationplacing dead/weakened virus inside host to stimulate immune system & produce antiviral substances. Preparing body's defenses against particular pathogens before it strikes. Body remembered the specific virus & is able to make the right antibodies to fight against it
OnocogensGenes that cause cancer
Cause of CancerVirus supressing immune system, causing inflamation over long period of time or alternating host genes
DNA tumor VirusesInfect cells & create viral DNA and protein; cannot assemble new viruses. New DNA turns into host cell part; causing rapid cell growth and division of cells
AIDSCaused by HIV, infecting helper T cell. Attaches to lymphocytes and injects its DNA. Lymphocytes now reproduce with HIV
HIV1. Acute Infection Stage-Flu symptoms 2. Clinical latency- Developing w/o reproducing 3. AIDS-Death within 3 years
Antiretroval ThrerapyTreatment for clinical latency; helps immune system guard itself from HIV virus. W/o ART; HIV weakens immune system, oppurtunistic infections take advantage of this and ravages body
ProphageProteins attaches to host DNA. Cell divides and prophage acts as a part of host. Causing no harm to person yet
External StimuliProphage becomes virulent due to radiation and other chemicals