Viruses & Immune Defense
Curated Microbiology deck. Add it to your library and study with spaced repetition.
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Are viruses considered living cells?
No: they lack cells and must hijack a host to reproduce.
What are the two core parts of a virus?
A nucleic acid genome (DNA or RNA) and a protein coat (capsid).
What is a host cell?
The cell a virus infects and uses to make copies of itself.
What is a bacteriophage?
A virus that infects bacteria.
What is the lytic cycle?
A viral cycle that quickly makes new viruses and bursts (lyses) the host cell.
What is the lysogenic cycle?
A cycle where viral DNA integrates into the host genome and lies dormant before activating.
What are the two main arms of the immune system?
Innate (fast, general) and adaptive (slower, specific) immunity.
What is an antigen?
A molecule the immune system recognizes as foreign and responds to.
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