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Viruses and Bacteria
Viruses and Bacteria
19
Biology
Not Applicable
05/25/2005

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Cards

Term
Prokaryotic cell
Definition
lacks a nucleuss, membrane-bound organelles, and chromosomes
Term
Cocus
Definition
Sphere Shaped ( O )
Term
Spirillum
Definition
Spiral ~~~~
Term
Baccillus
Definition
Rod Shaped 0
Term
Gram Positive Bacteria
Definition
cell wall is stained purple
Term
gram-negative bacteria
Definition
outer membrane doesn't hold the stain -> appears red
Term
Autotroph
Definition
organisms that make their own food
Term
Photoautotroph
Definition
uses solar energy to make their own food through photosynthesis
Term
Chemoautrophs
Definition
uses inorganic compoumds to make their own food through chemosynthesis
Term
Heterotroph
Definition
organism that can't make its own food obtains energy by feeding on other organisms and organic waste
Term
Binary Fission (a sexual)
Definition
after a bacteria cells has grown to double its size -> replicates DNA then splits in 2
Term
conjugation(sexual)
Definition
bridge forms betweem 2 bacterial cells and DNA is exchanged
Term
Decomposer
Definition
organisms that return nutrients to the environment by breaking down organic matter -> used in sewage treatment
Term
Pathogen
Definition
1. Breaks down cells for food 2. Releases toxins
Term
Pasteurization
Definition
Heating a liquid to a high temperatures -> kills bacteria
Term
Antibiotic resistance
Definition
bacteria become resistant to antibiotic
Term
Virus
Definition
noncellular particle made up of genetic material and protein that can invade living cells
Term
vaccination
Definition
injected with deadly or weakended form of bacteria -> creates immunity
Term
the lyctic cycle:
Definition
-virus attaches to the host cell
-virus injects its DNA into the host cell
-host cell synthesizes viral proteins and nucleic acids
-viral proteins and nucleic acids assmeble
infected cell lyses (bursts) and releases hundreds of new viruses that may now infect other cells
-newly formed viruses attach to another host cell and infect again....
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