Viruses, Prokaryotes, Protists, Immune Review 2025

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What is a virus?

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A virus is a microscopic infectious agent that can only replicate inside the living cells of an organism.

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What is the main function of the immune system?

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The immune system protects the body by fighting off pathogens.

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What is a prokaryote?

Back

A prokaryote is a single-celled organism that lacks a nucleus and other membrane-bound organelles.

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What unique component is found in a prokaryote's cell wall?

Back

Peptidoglycan is a unique component found in the cell wall of prokaryotes.

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How do bacteria move?

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Bacteria can move by swimming with a flagellum, grabbing on with pili, or spinning.

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Where do viruses reproduce?

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Viruses reproduce inside of a cell.

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What is the lytic cycle?

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The lytic cycle is a viral life cycle where the virus infects a host cell, replicates, and causes the cell to burst, releasing new viruses.

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What is the lysogenic cycle?

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The lysogenic cycle is a viral life cycle where the viral genetic material integrates into the host cell's DNA and can remain dormant while the host cell reproduces.

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What are protists?

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Protists are a diverse group of eukaryotic microorganisms, which can be unicellular or multicellular, and are not classified as plants, animals, or fungi.

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What is a pathogen?

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A pathogen is any organism that can cause disease, including viruses, bacteria, fungi, and parasites.