Shared Flashcard Set

Details

19-1, 19-2, 19-3
Vocabulary
27
Biology
9th Grade
02/08/2010

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Term
virus
Definition
particle made up of nucleic acid, protein, and in some cases lipis that can replicate only by infecting living cells
Term
capsid
Definition
outer protein of a virus
Term
bacteriophage
Definition
virus that infects bacteria
Term
lytic infection
Definition
process in which a virus enters a cell, makes a copy of itself, and causes the cell to burst
Term
lysogenic infection
Definition
process by which a virus embeds its DNA into the DNA of the host cell and is replicated along with the host cell's DNA
Term
prophage
Definition
the viral DNA that is embedded in the host cell's DNA
Term
retrovirus
Definition
virus that contains RNA as its genetic information
Term
pathogen
Definition
disease-causing agent
Term
vaccine
Definition
a preparation of weakened or killed pathogen
Term
antibiotic
Definition
compound that blocks the growth and reproduction of bacteria
Term
viroid
Definition
single-stranded RNA molecule that has no surrounding capsids
Term
prion
Definition
infectious particle made up of protein rather than RNA or DNA
Term
prokaryote
Definition
single-celled organism lacking a nucleus
Term
bacillus
Definition
rod-shaped prokaryote
Term
coccus
Definition
spherical prokaryote
Term
spirillum
Definition
spiral or corkscrew-shaped prokaryote
Term
chemoheterotroph
Definition
organism that must take in organic molecules for both energy and carbon
Term
photoheterotroph
Definition
organism that is photosynthetic but needs organic compounds as a carbon source
Term
photoautotroph
Definition
organism that uses energy from sunlight to convert carbon dioxide and water to carbon compounds
Term
chemoautotroph
Definition
organism that makes organic compounds from carbon dioxide using energy from chemical reactions
Term
obligate aerobe
Definition
organism that requires a constant supply of oxygen in order to live
Term
obligate anaerobe
Definition
organism that cannot live in the presence of oxygen
Term
facultative anaerobe
Definition
organism that can survive with or without oxygen
Term
binary fission
Definition
type of asexual reproduction in which an organism replicates its DNA and divides in half, producing two identical daughter cells
Term
conjugation
Definition
form of sexual reproduction in which paramecia and some prokaryotes exchange genetic information
Term
endospore
Definition
type of spore formed when a bacterium produces a thick internal wall that encloses its DNA and a portion of its cytoplasm
Term
nitrogen fixation
Definition
process of converting nitrogen gas into ammonia
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