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Prokaryotes
Section 1
35
Biochemistry
Undergraduate 2
10/10/2012

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Term
Phototrophs
Definition
Capture energy from sunlight, e.g. plants and algae
Term
Chemotrophs
Definition
Harness chemical energy stored in organic or inorganic molecules e.g. humans, animals, fungi, etc.
Term
Autotrophs
Definition
Organisms that make their own carbon from inorganic sources e.g. plants
Term
Heterotrophs
Definition
Obtain carbon from organic compounds
Term
Organic compounds
Definition
Contain carbon, as opposed to inorganic which don't
Term
How prokaryotes look
Definition
Cocci, bacilli, and spirochete
Term
Cocci
Definition
Tiny circles that stick together, in chains these are called streptococci, and clusters are staphylococci.
Term
Bacilli
Definition
Rode shaped, in pairs these are diplobacilli and chains are streptobacilli.
Term
Spirochete
Definition
Worm shaped / spiral shaped
Term
Pathogens
Definition
Disease causing agents
Term
Gram-stain
Definition
Determines what kind of antibiotics to prescribe
Term
Gram-negative
Definition
Harmful and difficult to treat because of the thick cell wall (made of lipid molecules bonded to carbs) the antibiotics have a hard time getting inside e.g. e coli
Term
Gram-positive
Definition
Thinner cell wall, easier for antibiotics to get inside, made of sugar polymers
Term
Projections
Definition
Flagella (very long, helps cell move towards food or away from something toxic) and fimbriae (help cell attach to the surface of something)
Term
Prokaryotes successful
Definition
Binary fission (reproduce quickly), genetic variation (spontaneous mutation, rapid adaption, etc.), formation of resistant cells
Term
Endospore
Definition
Allow bacteria to revert to a dormant state when conditions get bad, resistant cells
Term
Prokaryotes
Definition
Bacteria and archae
Term
Halophiles
Definition
Salt lovers thrive
Term
Thermophiles
Definition
Thrive in very hot temperatures, have special proteins so that they don't denature at high temperatures
Term
Archae
Definition
Inhabit extreme environments
Term
Transgenic plants
Definition
Give plant a better nutrient value by genetically modifying its genes/DNA
Term
Transgenic Bacteria
Definition
Genetically modified bacteria
Term
Domain
Definition
Highest taxonomic rank, composed of Archae, Bacteria, and Eukaryotes
Term
Kingdom
Definition
Fungi, animals, plants, etc. One below domain on the hierarchy
Term
Methanogens
Definition
Live in oxygen lacking environments and give off methane as a waste product (type of archae)
Term
Proteobacteria
Definition
Gram-negative and share an rRNA sequence can use all 4 ways to get energy e.g. e coli
Term
Gram-positive bacteria
Definition
Very diverse, e.g. streptomyces (in antibiotics)
Term
Cyanobacteria
Definition
Only group with plant-like, oxygen generating photosynthesis, symbiotic relationships. e.g. anabaena with specialized nitrogen fixing cells
Term
Chlamydias
Definition
Live inside eukaryotic host cells (bacteria)
Term
Spirochetes
Definition
Helical bacteria, that move by rotating. Many are pathogens, e.g. treponema pallidum causes syphiis (bacteria)
Term
Endotoxin
Definition
Part of the outer portion of gram-negative bacteria that are released when the cell dies or is digested
Term
Exotoxins
Definition
Protein toxins that bacteria cells secrete to enhance their own survival
Term
Heliobacter Pylori Experiment
Definition
Guy who swallowed a cocktail of pathogenic bacteria
Term
Ribosomes
Definition
Synthesize protein
Term
Exchange of plasmids
Definition
Aka the exchange of extrachromosomal DNA, which allows for genetic variation and rapid genetic adaption to the environment
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