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Bio ch 28

Chapter notes

QuestionAnswer
What are Eukarya more closely related to? Bacteria or Archaea Archaea
To make sense of variation between lineages and species biologist focus of these two themes. Morphology and Metabolism
Morphology Diversity Size, shape, motility, cell wall composition
Cell wall composition particularly important for single cell organisms
Gram Postive Stained purple, plasma membrane, surrounded by cell wall with extensive peptidoglycan
Gram Negative Pink, cell wall contains two components: 1) thin gelatinous layer containing peptidoglycan 2) outer phopholipid bilayer
Penecillin like drugs disrupt peptidoglycan synthessis
Erythromyacin poison bacterial ribosomes
Electron donors and light Getting a high energy electron, or using light to promote electrons to the top of the electron transport chain
Reducing means accepting electrons, getting electrons
Archaea lack peptidoglycan - there ribosomes are closer to eukaryotes and bacteria, and therefore their... - like us, they also gave introns -
Bacteria only bacteria can photo synthesize***, and fix nitrogen, so indirectly only they can fix C & N
Is it common for Bacteria and Archaea to employ elections donors with than sugar and electron acceptors other than O2? Yup. Will even use hydrogen sulfide (H2S)
Enrichment Culture also provide specific electron donor and specific electron acceptor
Does fermentation happen in all organisms? No
Species that use water as a source of electrons in photosynthesis Oxygenic
Bacteria come from the greek word Bacter, meaning rod or staff
Created by: hlatif
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