Virses Flashcards
Viruses are
The smallest organism
Structure of viruses
They have a protein coat which is for protection
Classifying virus
Are classified by their genome and their reproduction
DNA viruses
The genetic material acts as a direct to form a template on new DNA e.g small pocks
RNA ribosomes
More likely to mutate. Include tobaco mosaic viruses and polio
RNA retrovirus
Special type of RNA
Protein and lipid coats
Included HIV and some leukaemia
How viruses reproduce
There are viruses that kill bacteria
Involved in the battle with animals, crops and environment
Viruses of life cycle
Attack their host cells
Inject their genome into their host cells
DNA virus replication
Latency inserts their DNA into their host DNA so it’s replicated when the host DNA divides
Lytic replicated independently on the host DNA after entering to the host
DNA virus replication - positive ssRNA virus
Single strand of DNA
The protein included structural protein.
Negative ssRNA viruses
They have viral RNA can be transferred intk DNA and can take over the nucleus
Viruses and diseases
Digest themselves from the inside or toxins
Animal cancer’s have been linked to viral infection
Capsomers
Repeating protein u it’s making up the capsid of a virus
Viral attachment particles
Specific protein that uses the protein in the host cell
Retrovirus
Special type of DNA corresponding on the viral RNA and inserts into the host cells DNA
Reverse transcriptase
An enzyme synthesised in the life cycle of the virus that make up the DNA molecules corresponding to the viral RNA genome
Non- virulent
A microganism that is not disease causing
A provirus
The DNA is inserted into the host cell during the lysogenic pathway of replication in viruses
Lysogeny
Is a period when a viruses part of reproducing host cell
Virulent
Is a organism that is disease causing
