Term
|
Definition
breaking down molecules for energy
ex: food is broken down so you can use it for energy |
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Term
What are catabolic pathways? |
|
Definition
Breakdown large molecules in a series of steps and cause reactions that store energy in small carriers such as
ATP and NADH |
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Term
|
Definition
using energy to build cell components |
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Term
|
Definition
the balance between catabolism and anabolism
breaking and building up things |
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|
Term
what is used for catabolism and anabolism?
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Definition
central biochemical pathways (amphibolic) |
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Term
Whats is the TCA cycle
(Citric Acid or Krebs cycle)? |
|
Definition
glycoliysis, pentose phosphate shunt
chemical reactions used by all aerobic organisms to generate energy through
oxidization of acetate
derived from carbohydrates, fats and proteins
into carbon dioxide. |
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Term
|
Definition
energy required to bring all molecules in a chemical reaction to a reactive state |
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Term
|
Definition
catalytic proteins
speed up biochemical reaction rates
lower activation energy by bringing substrates into proximity of each other and correctly orienting them |
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Term
|
Definition
portion of an enzyme to which substrate binds
very specific for their substrate
(starch vs cellulose)
they can have small non proteins that help in catlysis but arent part of the enxyme or substrate |
|
|
Term
Types of enzymes:
Prostethic group-
coenzymes- |
|
Definition
prostethic group- bound tightly to their enzyme, usually covalently and permanently
EX:(heme group (non protein) in cytochromes(protein)
Coenzyme- loosely bound to their enzyme, may associate with different enzymes usually derivatives of vitamins
Ex: NAD+ derivative of niacin, can move from one enzyme to another
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Term
|
Definition
named after either the substrate they bind to, or the chemical reaction they catalyze with addition of suffix- ase.
ex: cellulase breaks down cellulose into glucose |
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Term
|
Definition
lithotrophy- inorganic molecules
organotrophy- organic molecules
phototrophy- uses light energy to reduce compounds then use these as an electron donor |
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Term
|
Definition
respiration- inorganic molecules
fermentation- organic molecules |
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|
Term
oxidation reduction reactions: |
|
Definition
involve the transfer of electrons from the electron donor to the electron acceptor |
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Term
|
Definition
there must also be a reduction |
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Term
in Redox reaction:
OILRIG |
|
Definition
substance oxidized is the electron donor
substance reduced in the electron acceptor |
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Term
electron carrier: for the transfer of electrons fgrom donor to acceptor |
|
Definition
*are membrane bound, prostethic groups like cytochrome c.
*freely diffusible coenzymes like NAD+ or NADP+
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Term
|
Definition
involved in energy generation catabolic reactions |
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Term
|
Definition
involved in biosyntheitc anabolic reactions |
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Term
|
Definition
act as intermediates between a primary electron donor and a terminal electron acceptor that would normally be redox couples |
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Term
|
Definition
energy released through a redox reaction that is stored in the formaiton of compounds with energy rich bonds
main carrier energy of the cell |
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|
Term
what does cleavage of each phophohydride bond do? |
|
Definition
|
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Term
|
Definition
phosphate added to ADP via dehydration to make ATP
hydrolysis of ATP to ADP yields energy |
|
|
Term
how does ATP transfer energy to cell processes?
|
|
Definition
- hydrolysis, releasing 1-2 phosphates
- phosphorylation of an organic molecule in the phophotransferase system
- derivatives of coenzyme A have thioester bonds that release free energy upon hydrolysis
- long term storage of energy involves glycogen and poly-B-hydrocybutyrate which can be consumed to yeild ATP
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Term
|
Definition
light absorption by chlorophyll drives photolysis of an organic molecule
no exogenous (outside) electron acceptors
electron acceptor must be derived from the electron donor
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Term
|
Definition
(redox)- breakdown of organic molecule with electron transfer to inorganic molecule such as Oxygen or Nitrogen (yeilds more enrgy than fermentation)
molecular oxygen or some other terminal electron acceptor is present
ATP is produced by both substrate level phosphorylation & oxidative phosphorylation
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|
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Term
|
Definition
(redox)- partial breaksdown of organic matter without transfer of electrons to an inorganic terminal electron acceptor
ATP is produced by substrate level phosphorylation during catabolism of an organic compound
substrate level phosphorylation- a phosphate group is added to an intermediate in a biochemical pathway and is eventually transferred from ADP to form ATP
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|
|
Term
oxidative phosphorylation |
|
Definition
ATP is synthesized by a proton motive force generated by redox reactions
requires enzyme ATP synthase which uses proton motive force to produce ATP from ADP. |
|
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Term
|
Definition
method of producing ATP in photosynthetic organisms
light instead of a chemical compound drives the reox reaction that generates the proton motive force |
|
|
Term
Bacteria and Archaea
3-Main routes to convert glucose to pyruvate |
|
Definition
glycolysis/Embden-Meyerhof (EMP)
generates 2 ATP and 2 NADH
major pathway of glucose metabolism
series of reaction in which each molecule of glucose is oxidized to 2 molecules of pyruvate with a small amount of energy (ATP being generated
many carbon molecules are broken down into glucose and then enter glycolysis |
|
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Term
Bacteria and Archaea
3-Main routes to convertglucose to pyruvate |
|
Definition
Entner-Doudoroff (ED) pathway
glucose or sugar acids are converted to pyruvate generating 1 ATP, 1 NADH and 1 NADH
common in enterics
(intestinal bacteria)
|
|
|
Term
Bacteria and Archaea
3-Main routes to convert glucose to pyruvate |
|
Definition
phentose phosphate shunt (PPS)
glucose is converted to sugars with 3 to 7 carbons which are precursors for biosynthesis
or to pyruvate generating 1 ATP and 2 NADPH |
|
|
Term
precursor metabolites
(compounds used to make all the macromolecules in the cell)
made in glycolysis |
|
Definition
glucose-6-phosphate fructose-6-phosphate glyceraldehyde-3-phosphate 3-phosphoglycerate phosphoenolpyruvate pyruvate |
|
|
Term
|
Definition
- glucose is oxidized to 2 molecules of pyruvate
- net gain of 2 ATP
- 6 precursor metabolites are made
- NADH is formed which will be converted back to NAD in the electron transport system or in the fermentation reaction (NADH -> NAD)
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|
|
Term
|
Definition
- studied for its role in production of cactus beer by Zymomonas fermentation of the blue agave plant
- ED pathway allows E. Coli and other enterics to feed on mucus secreted by intestinal epithelium
- Glucose -> pyruvate (different enzymes than glyco.)
- Net gain 1 ATP/ glucose and precursor metabolites
- used by enterics and enterococcus faecalis
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|
|
Term
Pentose Phosphate Pathway
phosphorylations pentose (5 carbon sugars) |
|
Definition
formed from G6P
-ribulose -xylulose -ribose
used for production of precursor metabolite s in anabolic reactions
Net gain 1 ATP/glucose
respiration-(TCA cycle) to be fully oxidized to carbon dioxide; this makes more ATP, so if an organism has a choice it will choose respiration
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|
|
Term
Ribulose 1,5-biphosphate ( used in Calvin Cycle) is made by phosphorylating a precursor from this pathway
-pyruate can either be used in fermentaion (to make alcohols acids gases)
respiration-(TCA cycle) to be fully oxidized to carbon dioxide; this makes more ATP, so if an organism has a choice it will choose respiration
What pathway forms this pyruvate? |
|
Definition
pentose phopshate pathway |
|
|
Term
|
Definition
can occur in the presence of O2
1 glucose molecule -> 2 ATP
partial oxidation of glucose
reduction of pyruvate
fermentation products
NAD+ |
|
|
Term
|
Definition
1 glucose molecule -> up to 38 ATP
complete oxidation of glucose to CO2
oxidation of pyruvate by TCA cycle
uses electron transport chain (ETC) and ATP synthesis
|
|
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Term
|
Definition
glycolysis occurs followed by fermentation reactions (NO TCA, NO ETC)
- electrons from glucose are passed to 2 NAD+ creating NADH
- electrons are then passed from NADH to pyruvate, regenerating NAD+ so glycolysis can continue
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|
|
Term
|
Definition
homolactic fermentation
alcoholic fermentation |
|
|
Term
|
Definition
once electrons from NADH are passed to pyruvate, pyruvate is reduced to lactic acid
ex: lactobacillus- ferments lactose sugar in milk to produce lactic acid, this gives us yogurt |
|
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Term
|
Definition
once electrons are passed from NADH to pyruvate, pyruvate is reduced to alcohol adn CO2
ex: Yeast, ferment the sugars in malted graisn to produce alcohol and CO2 (beer, wine, bread) |
|
|
Term
In fermentation, who is the elctron donor and who is the elctron acceptor? |
|
Definition
electron donor- glucose
electron acceptor- pyruvate (which is made from glucose) |
|
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Term
|
Definition
uses oxygen or other compounds from the environment to accept the electrons from NADH
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Term
|
Definition
uses oxygen to accept electrons |
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Term
|
Definition
uses other compounds from the environment other than oxygen
may be inorganic compound such as Nitrate, ferric iron, sulfate or carbonate |
|
|
Term
Tricarboxylic Acid Cycle
TCA cycle
krebs cycle
citric acid cycle
|
|
Definition
cyclic pathway to fully oxidize organic materials
into a small amount of ATP
-NADH and FADH2 (also used in ETC)
-CO2 is a waste product
-Precursor metabolites |
|
|
Term
|
Definition
occurs during respiration
oxidized pyruvate completely to CO2
only possible with an inorganic electron acceptor
produces more energy than fermentation
|
|
|
Term
pyruvate dehydrogenase complex (PDC)
|
|
Definition
converts pyruvate to acetyl-CoA
removes CO2 (changes 3 carbons into 2 carbosn) (decarboxylation)
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|
|
Term
what is the substrate for the TCA cycle? |
|
Definition
acetyl CoA by way of pyruvate dehydrogenase complex (decarboxylation) |
|
|
Term
what precursor metabolites are made in the TCA Cycle? |
|
Definition
alpha-ketoglutarate & oxaloacetate
(used to make amino acids and nucleotides) |
|
|
Term
Reactions of the TCA Cycle |
|
Definition
Acetyl CoA + oxaloacetate (4C)= citrate (6C)
acetyl CoA is oxidized to CO2
original oxaloacetate is regenerated
CO2 is released
NADH & FADH are generated
precursor metabolites are made to be used for biosynthesis
|
|
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Term
|
Definition
aromatic compounds (benzene rings) converted to pyruvate which enters the TCA cycle
allows for growth in wide range of environments
used for bioremediation
(cleaning oil spills, industrial sites, degrading toxic compounds)
|
|
|
Term
|
Definition
pair of electrons from NADH is passed through series of intermediates to oxygen
NADH is oxidized back to NAD+, oxygen is reduced to water
Oxygen is the terminal electron acceptor
|
|
|
Term
Intermediates that pass electrons from NADH to Oxygen during aerobic respiration |
|
Definition
flavoproteins
cytochromes
quinones
iron-sulfur proteins |
|
|
Term
ETC
(electron transport chain) |
|
Definition
ETC is made up of intermediates
(such as flavoproteins)
prokaryotes: ETC is the cytoplasmic membrane
eukaryotes: ETC is the mitochondria
(powerhouse of cell)
ETC, series of membrane associated electron carriers that carry electrons from the primary electron donor to the terminal electron acceptor |
|
|
Term
|
Definition
known as oxireducatases-
because they oxidize one substrate and thenr educe another |
|
|
Term
|
Definition
different organisms have different ETC
some have more than one due to different growth conditions
at each step: some electrons are used to push hydogen ion across the cytoplasmic membrane into the periplasm or to the outside of the CM
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|
|
Term
hydrogen ion gradient
proton motive force
chemiosmosis |
|
Definition
creates a hydrogen ion gradient across the CM
The outside of the CM becomes more acidic &
more + charged that the cytoplasm
(halophiles use sodium motive forces (Na+ ion gradient)
gradient is a source for potential energy
|
|
|
Term
|
Definition
adds a phosphate group to ADP to make ATP
allows protons to cross back into the cytoplasm
energy is released by reducing the hydrogen ion gradient
this energy is used to make the high energy bond of ATP
oxidative phosphorylation- process of using the hydrogen ion gradient to make ATP
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|
|
Term
high energy phosphate group to ADP to make ATP |
|
Definition
substrate level phosphorylation |
|
|
Term
energy from hydrogen ion gradient to make ATP |
|
Definition
oxidative phosphorylation |
|
|
Term
Aerobic respiration summary |
|
Definition
glucose -> pyruvate -> pyruvate is oxidized-> CO2(TCAcycle)
electrons from NADH are transferred to oxygen through ETC |
|
|
Term
Anaerobic respiration summary |
|
Definition
same as aerobic respiration
energy is used to move protons across cytoplasmic membrane to periplasm
ATPase uses energy from hydrogen ion gradient to produce ATP
difference is that the final electron acceptor is some compound other than oxygen
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|
|
Term
|
Definition
11 precursor metabolites in E. Coli
6 from glycolysis 3 from TCA 2 from Pentose phosphate
convert precursors into building blocks (monomers) such as amino acids and nucleotides
Monomers are polymerized to form macromolecules (proteins and nucleic acids) & structures (LPS)
|
|
|
Term
Monomer->
Sugar->
Nucleotide->
Amino Acid->
Fatty Acid->
|
|
Definition
Polymer
Polysaccharide
Nucleic Acid
Protein
Lipid |
|
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Term
|
Definition
process by which organisms growing in an environment without building blocks are biosynthesized from simpler components |
|
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Term
|
Definition
use light to form a proton motive force and make ATP
cyanobacteria= photoautotrophs |
|
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Term
|
Definition
anoxygenic- no oxygen is produced
(most photosynthetic bacteria are anoxygenic phototrophs)
oxygenic- water is split to produce oxygen
cyanobacteria- (only bacterial group) and photosyntheric eukaryotes (plants) are oxygenic autotrophs |
|
|
Term
pigments of photosynthesis |
|
Definition
chlorophylls in oxygenic phototrophs
bacteriochlorophylls in anoxygenic phototrophs |
|
|
Term
photosynthetic eukaryotes |
|
Definition
have chloroplasts that contain the photosynthetic membranes known as thylakoids |
|
|
Term
photosynthetic prokaryotes |
|
Definition
do not have chloroplasts
the photosynthetic membranes are:
cytoplasmic membrane in many bacteria
chlorosomes in green bacteria
thylakoid in cyanobacteria |
|
|
Term
green sulfur bacteria and chlorofexus |
|
Definition
have the ultimate in low light efficiency in regards to photosynthesis in their chlorosomes |
|
|
Term
antenna chlorophyll molecules |
|
Definition
harvest light energy and transfer it to the reaction center where the conversion of light energy to ATP occurs |
|
|
Term
wavelengths of light are absorbed... |
|
Definition
differently by different color pigments |
|
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Term
|
Definition
absorption meter of different chlorophylls and bacteriochlorophylls |
|
|
Term
cartenoids and phycobilins |
|
Definition
accessory pigments that absorb light and transfer energy to the reaction center chlorophylls |
|
|
Term
|
Definition
allow organisms to capture additional wavelengths of light |
|
|
Term
|
Definition
play an important photoprotective role in preventing photooxidative damage to cells (due to toxic forms of oxygen) |
|
|
Term
anoxygenic photosynthesis |
|
Definition
photosynthesis that does not produce oxygen |
|
|
Term
anoxygenic phototrophs
(use photosynthesis in the light, respiration in the dark and grow in the presence or absence of oxygen) |
|
Definition
proteobacteria (purple sulfur and non purple sulfur)
Chloroflexus (green non sulfur)
chlorobium (green sulfur)
heliobacteria (ONLY Gram +)
Rhodobacter species- are used for stufying anoxygenic
photosynthesis
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|
|
Term
|
Definition
algae & cyanobacteria use electrons from H2O to reduce NADP for CO2 fixation producing O2 as a byproduct
2 seperate reactions :
photosystem I- resembles anoxygenic rxn
photosystem II- splits H2O to yield O2 |
|
|
Term
Autotrophic Fixation
autotrophs use CO2 as sole carbon source
convert CO2 into organic carbon compounds (CO2 fixation)
The Calvin Cycle |
|
Definition
RubisCO enzyme catalyzes condensation of CO2 + ribulose,
1-5 biphosphate -> 3- phosphoglycerate -> glyceraldehyde-3-phosphate ->
fructose-6-phosphate
requires large amount of ATP
F-6-P goes into glycolysis
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|
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Term
|
Definition
store molecules of RubisCO |
|
|
Term
energy demanding process in which CO2 is converted into sugar |
|
Definition
|
|
Term
reverse TCA cycle for CO2 fixation
uses the hydrooxypropionate pathway |
|
Definition
green sulfur bacteria and chloroflexus |
|
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Term
|
Definition
energy from the oxidation of inorganic electron donors
oxidize inroganic chemicals as their sole source of energy
autotrophs-> fix CO2 as their carbon source |
|
|
Term
examples of chemolithotrophy |
|
Definition
hydrogen oxidation
oxidation of reduced sulfur compounds-(H2S, S)
iron oxidation- oxidizes ferroud iron (fe+2)-> ferric iron (fe+3)- most are obligately acidophilic
nitrification- convert ammonia to nitrate (NH2->NO3)
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|
|
Term
nitrate reduction and denitrification
|
|
Definition
nitrate (NO3-) ->
nitrite (NO2-) ->
(g)Nitric oxide (NO) ->
(g)nitrous oxide (N2O) ->
(g)dinitrogen (N2)
all used reductase enzymes |
|
|
Term
|
Definition
reduce nitrate to gases such as nitrogen, nitrous oxide, nitric oxide
nitrate is the electron acceptor
ETC process is the same as aerobic respiration
only difference is that electrons are used to reduce nitrate instead of oxygen |
|
|
Term
sulfate reduction- sulfate reducing bacteria |
|
Definition
use sulfate as an electron acceptor (anaerobic respiration) converting it to hydrogen sulfide |
|
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Term
|
Definition
biological production of methane (CH4) from CO2 plus H2 from methylated compoun ds |
|
|
Term
|
Definition
strictly anaerobic Archaea capable of methanogenesis |
|
|
Term
|
Definition
reduction of atmospheric N2 to ammonia NH3
energy expensive (40 ATP consumed for fixation of 1 N2)
requires nitrogenase which is inhibited by oxygen
most organisms only fix N when growing anaerobically
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|
|
Term
aerobic nitrogen fixing bacteria protective measures against O2: |
|
Definition
protective proteins to stabilize
removal of O2 by respiration
O2 retarding slime layers
compartmentalization of nitrogenase in special cells
(cyanobacteria have heterocysts where N fixation occurs)
some are symbiotic with plants and provide plants the necessary N in exchange for protection (plants grow fuller) |
|
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Term
|
Definition
study of evolutionary relationships of organisms |
|
|
Term
comparing rRNA sequences is used to... |
|
Definition
determine evolutionary relationships |
|
|
Term
Ribosomal Database Project |
|
Definition
contains a large collection of rRNA sequences |
|
|
Term
|
Definition
|
|
Term
|
Definition
Domain
Phylum
Class
Order
Family
Genus
Species |
|
|
Term
binomial system of nomenclature |
|
Definition
descriptive genes and species epithet |
|
|
Term
international code of nomenclature of bacteria |
|
Definition
regulates naming of prokaryotes |
|
|
Term
Bergeys Manual of Systematic Bacteriology and The Prokaryotes |
|
Definition
major taxonomic compilations of Bacteria and Archaea |
|
|
Term
|
Definition
optimum growth temperatures 80C found near hydrothermal vents and hot springs
fastest growing cells known
|
|
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Term
|
Definition
most ancient and thermophilic of known bacteria grow up to 95 C |
|
|
Term
|
Definition
cells surrounded by protein covering (toga) that balloons over ends |
|
|
Term
|
Definition
grouped with thermophiles due to ribosome similarities
highly resistent to radiation due to DNA repair mechanisms
Gram + thick peptidoglycan layer but has outer membrane like G- |
|
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Term
|
Definition
thermophile
DNA polymerase used in PCR |
|
|
Term
|
Definition
large group of oxygenic phototrophs
fix CO2 (calvin cycle)
fix N2 (heterocysts)
can cause nuisance blooms (takeover water and keep growing)
have thylakoids- site of photosynthesis
(like chloroplasts)
can grow as:
filaments (many cells growing in a line)
colonies
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|
|
Term
cyanobacteria may or may not: |
|
Definition
have gas vesicles for buoyancy
secrete neurotoxins and can kill animals that have ingested the water
form akinetes (specialized spore cells) to survive long periods of dessication and germinate when conditions improve |
|
|
Term
|
Definition
prochlorococcus
possibly the most abundant oxygenic phototroph on earth |
|
|
Term
|
Definition
divided into two groups based on % of guanine and cytosine in DNA
low GC- firmicutes
high GC-actinobacteria |
|
|
Term
|
Definition
rods and cocci
pathogens
staphylococcus
|
|
|
Term
|
Definition
endospores are extremely heat resistent for millenia
toxin-formers
clostridium (tetanus, botox, gangrene)
bacillus (anthrax, Bt) |
|
|
Term
molicutes-
ex: mycoplasma |
|
Definition
without a cell wall
small genomes
pleomorphic (no distinct shape)
classifed as Gram + due to phylogenetic relatedness
pathogenic
|
|
|
Term
Gram + Actinobacteria
ex: streptomyces (earthy odor of soil) |
|
Definition
branching filaments called mycelia
(like filamentous fungi)
reproductive spores called conidia
sporulation triggered by nutrient depletion |
|
|
Term
mycobacteria-
ex: tuberculosis leprosy
mycobacterium |
|
Definition
acid fast due to mycolic acids
some human pathogens
many are slow growers
|
|
|
Term
Gram - Proteobacteria and Nitrospirae |
|
Definition
largest group and most metabolically diverse group of bacteria
5 major phylogenetic subdivisions |
|
|
Term
alpha proteobacteria-
ex:
rhizobium, argobacterium in plants root nodules plant tumors
rickettsias in animals- rocky mountain spotted fever |
|
Definition
some endosymbionts
get matbolites from host
transmitted between animal arthropods |
|
|
Term
prostecate/ stalked bacteria |
|
Definition
reproduce by budding
appendages used for attachment
aquatic environments |
|
|
Term
|
Definition
lithotrophs- nitrate sulfur iron oxidizers
pathogens- nisseria gonnorrhea Gram - cocci |
|
|
Term
gamma proteobacteria
ex: vibrio and photobacterium |
|
Definition
purple sulfur and non sulfur bacteria
(found in mud and water)
lithotrophs
can use iron or H2S as an electron donor
some are anoxygenic phototrophs
some bioluminescent
|
|
|
Term
|
Definition
colonize human colon
motile- different arrangement of flagella
some in biofilms, some pathogenic |
|
|
Term
delta proteobacteria
myxococcus |
|
Definition
attacks other bacteria in packs, (Social movement)
aggregates into fruiting bodies
disperses myxospores
|
|
|
Term
delta proteobacteria-
bdellovibrio |
|
Definition
parasitizes other bacteria
grows in periplasms
lyse host |
|
|
Term
epsilon proteobacteria
heliobacter pylori |
|
Definition
smallest group of proteobacteria
causes stomach ulcers
burrows below protective mucous layers |
|
|
Term
|
Definition
1st identified by rRNA sequencing (little known about them)
spiral shaped
nitrite oxidizers; obligate aerobes
some found in microbial mats near hot springs |
|
|
Term
obligate anaerobes
bacteroides |
|
Definition
predominant microbe in lower digestive tract of humans and other animals can be pathogenic
in digestive tract, undigested food is fermented by bacteroides
fermentation products are used by animal as carbon and energy source
|
|
|
Term
chlorobium
green sulfur bacterium |
|
Definition
anoxygenic photolithotroph (dont produce oxygen)
contain chlorosomes- bacteriochlorophyll containing structure that are attached to the cytoplasmic membrane
found at greatest depths of water in any phototrophic organism
use H2S as electron donor and oxidize it to sulfur
sulfur granules are deposited outside of the cell
autotrophs- no calvin cycle ; reverse citric acid cycle |
|
|
Term
|
Definition
motile
endoflagella located in the periplasm of the cell
ex:
teronema pallidum causes syphillis
(cant be grown in lab culture)
borrelia burgdorferi causes lyme disease, has a linear chromosome |
|
|
Term
|
Definition
obligate intracellular parasites of animals
little metabolic capacity
no peptidoglycan
causes human disease (VD, Psittacosis(epidemic in birds causes pneumonia in humans), conjunctivitis (leads to blindness)
larger reticulate body (grows within cells doesnt survive outside of host)
small elementary bodies (survive outside host, similar in function to endospores) |
|
|
Term
planctomycetes
Gemmata- membrane bound nuclear material (unique in prokaryotes) |
|
Definition
s layer protein cell wall
reproduce by budding
some have stalks for attachment
multiple internal membranes
|
|
|
Term
verrucomicrobia-
wrinkled microbes |
|
Definition
irregular shape
contains tubulin |
|
|
Term
|
Definition
Phylum Eukaryarchaeota
Phylum Crenarchaeota
Phylum Nanoarchaeota
Phylum Korararchaeota |
|
|
Term
|
Definition
4 groups-extreme halophiles, methanogens, thermoplasmatales, hyperthermophiles
|
|
|
Term
extreme halophiles
halobacterium salinarium |
|
Definition
at least 9% NaCl for growth
common in salt lakes and salterns
give red color to water
to prevent water loss in hypertonic environment-
1) pump inorganic ions (k+) into cell
2) make or concentrate an organic solute in cell
|
|
|
Term
|
Definition
release 100 millions tons of methane into atmosphere each year
found in anaerobic environments (strict anaerobes)
freshwater sediments
gastrointestinal tract of animals
rumen
landfills
termite gut |
|
|
Term
thermoplasmatales
thermoplasma |
|
Definition
lack cell walls
thermophilic and acidophilic
most strains have been isolated from self heating coal refuse piles
|
|
|
Term
hyperhtermophiles
pyrococcus "fireball" |
|
Definition
|
|
Term
Phylum Crenarchaeota
sulfolobus |
|
Definition
irregular in shape
may have no cell wall
always have unique liquid
most are hyperthermophiles (hot springs)
some are psychophiles (sea ice)
often very acidic or anaerobic
most use sulfur as electron acceptor
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Term
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Definition
nanoarchaeum cells are symbionts or parasites of Ignicoccus (creoarchaeote)
small genome
lack genes for most metabolic functions; depend on the host
hydrothermal vents and hot springs |
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Term
Phylum Korararchaeota
(Ancient Archael Group) |
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Definition
found in obsidian pool at yellowstone
hyperthermophiles 85*C
no pure culture exists |
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Term
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Definition
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Term
fungi
rhizopus- bread mold |
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Definition
cell walls contain chitin
non-motile
most grow hyphae
mycelium-branched mass of hyphae
absorptive heterotrophs
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Term
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Definition
motile flagella reproductive zoospores
(symbiont in bovine rumen, frog pathogen) |
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Term
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Definition
unicellular fungi, reproduce via budding |
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Term
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Definition
nonmotile sporangiospores spread through air or water fuse to form a zygospore
arbuscal mycorrhizae-assoc. w plant roots, increase absorption |
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Term
ascomycetes
candida- yeast that causes thrush and yeast infections |
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Definition
fruiting bodies form asci containing acsospores
morels and truffles grow low to the grown, very expensive |
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Term
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Definition
produces spores called basidiospores
true mushrooms |
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Term
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Definition
phytoplankton
all have chloroplasts
many have paired flagella
cell wall made of glycoprotein or cellulose
contractile vacuole removes excess water
stores energy as starch |
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Term
algae- chlorophyta
green algae |
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Definition
chlorophyll
grow near top of water
multiple life forms
unicellular forms have flagella
filaments- spirogyra
individual cells- chlamydomonas
sheets- ulva
colonies- volvox |
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Term
algae- rhodophyta
red algae |
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Definition
phycoerythrin gives red color
sulfated sugar polymers- agar, agarose carrageenan
unicellular, filaments, or sheets
porphya- nori (used for sushi wraps) |
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Term
Protists- Amoebozoa
entamoeba histolytica |
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Definition
amorphous shape
move using pseupods
actin pushes cytoplasmic streams ahead
cell rolls over membrane
engulf with pseudopods
slime molds
aggregate to form a fruiting body
spores are released from the fruiting body |
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Term
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Definition
live in marine habitats
radiolarians- needle-life pseudopods, shells made of silica, stabilized with microtubules
foraminiferans- shells mad eof calcium carbonate, indicators of petroleum deposits |
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Term
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Definition
alveola- flattened vacuoles at outer cortex
extrusomes- secrete enzymes, toxins
microtubules- stabilize the structure
multiple cilia or flagella |
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Term
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Definition
many cilia for motility, also for feeding
contractile vacuole to maintain osmotic balance
stalked ciliate attach to surface |
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Term
alveolates- dinoflaggellates |
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Definition
phytoplankton
cartenoids in some-red color
two long flagella (one wrapped around cell groove)
extrusome secretes toxins(neurotoxins)
endosymbionts- essential for coral survival
coral bleaching- when dinoflagellates leave the presence of the coral, they will lose their color |
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Term
alveolates- apicomplexans
plasmodium- malaria |
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Definition
apical complex invades host cell
no cilia
obligate parasite
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Term
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Definition
lesihmania major- carried by sand-fly skin and organ infections
trypanosoma brucei- carried by tsetse fly(african sleeping sickness)
T. cruzi-carried by kissing bug (Chaga's Disease) |
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Term
excavates
Giardia lamblia- passed around in daycares or water (stomach illness) |
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Definition
lack mitochondria (cant produce energy)
obligate parasites
anaerobes |
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