Textbook Notes (368,795)
United States (206,114)
BIOL 2051 (13)
All (13)
Chapter 4

Chapter 4 (got 96%)

12 Pages
Unlock Document

Biological Sciences
BIOL 2051
All Professors

Chapter 4 Bacterial Culture Growth and Development Microbial NutritionAll life requiresElectron flow to drive all life processesDrives ions into out of cellsUsed to create ATP Energy to move electronsMaterials to make cell partsNutrientsCHONPS carbon hydrogen oxygen nitrogen phosphorous sulfurElectron flow requiresSource of electronsLithotrophs Inorganic molecules are electron donors ex IronOrganotrophsOrganic molecules are electron donors ex glucosewhat we add to culture mediaUltimate electron acceptorInorganic molecules ex nitrate or oxygenSaid to grow by respirationOrganic molecules ex pyruvateSaid to grow by fermentationSource of energyPhototrophs plants cyanobacteria Light energy excites electronsExcited molecules are electron donorschemotrophsChemicals are electron donorsOxidation of chemical oOxidationdonation of electrons ultimately used as an energy sourceNutrientsMacronutrients Major elements in cell macromoleculesoC H O N P SIons necessary for protein function222oMg Ca Fe KMicronutrientsTrace elements Co Cu Zn etc Growth factors organic compounds necessary for enzyme functionDifference bw trace elements and growth factorsoGrowth factors and organic COMPOUNDSoTrace are just elements from periodic tableCarbon large amount needed by cells to form organic compounds amino acids fatty acids sugarsnitrogenase bases to carry out cellular functions Autotrophsprokaryotes that can make all cellular structures from CO2Heterotrophsmust obtain carbon from organic compounds most prokaryotesNitrogenneeded by cells for amino acids nitrogenous basesother cell constituentsNitrogenfixing prokaryotes capable of using atmospheric nitrogen gasMost prokaryotes obtain nitrogen from compounds such as ammonia and nitrateEnergy sourcesChemoorganotrophs energy from oxidation removing electrons of organic compoundsChemolithotrophsenergy from oxidation of inorganic compounds Only in prokaryotes AdvantageoLess competition in certain environmentsPhototrophscontain pigments that allow them to use light as an energy sourceNo worry about energy source as long as they have light
More Less

Related notes for BIOL 2051

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.