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22 Cards in this Set

  • Front
  • Back
group of parasites composed of protein and nucleic acid inside a protein coat. infectious agents smaller than bacteria that require host cells for replication.
Organism whose genetic material is not contained within a nucleus
A provirus is a virus genome that has integrated itself into the DNA of a host cell.
provirus does not directly make new DNA copies of itself while integrated into a host genome in this way. Instead, it is passively replicated along with the host genome and passed on to the original cell's offspring; all descendants of the infected cell will also bear proviruses in their genomes. Integration can result in a latent infection or a productive infection.
Examples in humans include HIV and HTLV.
prion (prion diseases)
versions of otherwise normal proteins that are misfolded. This causes massive clumps and over time holes in the brain tissue, giving it a spongy appearance.
Results in loss of coordination and brain function.
bacteria shaped like a ball.
bacteria shaped like a rod.
bacteria shaped like a corkscrew.
bacteria filaments - help the cell stick to surfaces.
A plasmid is a DNA molecule separate from the chromosomal DNA and capable of autonomous replication. Circular and double-stranded.
antiviral drug
prevent virus particles from exiting host cells and/or interfere with the viral "life cycle".
substance that can destroy or inhibit the growth of bacteria and some other micro-organisms.
disease rate increases above what we would predict.
epidemic breaks out in several countries in a given time span.
sporadic disease
breaks our irregularly and affects relatively few people. (whooping cough)
occurs more or less continuously (common cold)
Acquired immune deficiency syndrome
a collection of symptoms and infections resulting from the specific damage to the immune system caused by the human immunodeficiency virus (HIV) in humans.
Human immunodeficiency virus.
a retrovirus that causes acquired immunodeficiency syndrome.
The human immunodeficiency virus that can cause AIDS
Why is there a cure for AIDS?
There is no cure for AIDS. There are drugs that can slow down the HIV virus, and slow down the damage to your immune system. There is no way to "clear" the HIV out of your body.
Describe the structure of a virus.
a virus particle consists of a nucleic acid core inside a protein coat called a capsid. Sometices the capsid is also enclosed, in a lipid envelope. The coat around consists of protein subunits. The coap protects the viral genetic material while traveling from one host to another. When a virus is surrounded by a membrane is is called enveloped.
Explain how viruses are reproduced using the machinery of a living cell.
the reproduction process begins when a virus particle attaches to the host cell
They are enveloped viruses possessing a RNA genome, and replicate via a DNA intermediate. Retroviruses perform a reverse transcription of its genome from RNA into DNA. The virus then replicates as part of the cell's DNA.
How can a cell make more RNA viruses?