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SCience Chapter 21 Vocab

Terms

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Pathogen
a disease causing agent
Spirillum
Spiral shaped bacterium
Lytic
cycle of viral infection results in replication of viruses and cell destruction
Bacillus
Rod shaped bacterium
Capsid
A protein sheath that surrounds the nucleic acid core in a virus
Coccus
Spherical Shaped Bacterium
Anaerobic
Processes that do not require oxygen
Aerobic
Processes that require oxygen
Envelope
outer layer covering the capsid of many kinds of viruses
Pilus
Short thick outgrowth of a bacterium that allows it to attach to another bacterium
Viroid
in plants infectious disease agent composed of a single strand of RNA with no capsid
Lysogenic Cycle
A cycle n which a viral genome replicates as a virus with ought destroying the host cell
Provirus
the viral DNA which inserts itself into a host cell's chromosome
Glycoprotein
protein with carbohydrate molecules attached
Capsule
A Gelatinous outer layer enclosing many bacterial cell walls
Endospore
Dominant bacterial cell enclosed by a tough coating that is highly resistant to environmental stresses
Emerging Virus
A virus that evolves in a geographically isolated area and is pathogenic to humans
Conjungation
temporary union of two organisms to exchange nuclear material
Bacteriophage
Virus that infects Bacteria
Toxin
Chemical compound excreted into the environment by bacteria that are poisonous to eukaryotic cells
Virus
A strand of nucleic acid encased in a protein coat that can infect cells and replicate within them
Antibiotic
Chemical used as a drug to kill bacteria
Prion
Infectious particles composed of protein with no nucleic acid

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