Prokaryote vs. Eukaryote Cell Walls, Cell Surface Layers, & Biosorption- Geobiology | GEO GIRL

The video covers structures of bacterial cell walls, archaea cell walls, animal vs. plant cell walls, algae and fungi cell walls, and the passive and active biosorption processes that occur on various cell wall types. Remember that absorption is in and adsorption is on, so in terms of biosorption we are typically taking about adsorption. When nutrients are absorbed all the way into the cell, we call that uptake rather than sorption. Biosorption causes ions to adsorb to the surface of the cell (whether that be the outer part of the cell wall or something external to that that the bacteria excretes, such as EPS (extracellular polymeric substances), capsules, sheaths, s-layers, etc.). These ions are attracted to the cell because of the charge of the cells surface layers. This type of biosorption is called passive biosorption. However, biosorption can occur by active processes too. For example, microbes can excrete specific enzymes that bind specific ions that they want to take back into their cell to use. They can also excrete these enzymes to bind ions they do not want to come into their cell. This can occur when certain metal ions in the environment are toxic. When these toxic metals are around, microbes can immobilize them by excreting material specific to binding that metal and by doing so they detoxify their environment. We will talk more about biosorption in the upcoming bioremediation video! References: Geomicrobiology by Kurt Konhauser: https://amzn.to/3tqiKMo Brock, Biology of Microorganisms: https://amzn.to/3BWGHOG GEO GIRL Website: https://www.geogirlscience.com/ (visit my website to see all my courses, shop merch, learn more about me, and donate to support the channel if you'd like!) 0:00 Importance of this topic & outline 2:08 bacterial cell walls: gram negative vs. gram positive 4.52 bacterial excretions: EPS 6:55 bacterial excretions: sheaths 8:15 bacterial excretions: S layers 9:53 archaeal cell walls 10:52 extremophile archaeal cell walls 13:02 eukaryotic cell walls: plants and animals 14:00 eukaryotic cell walls: algae and fungi 15:16 cell surface charge 17:20 passive biosorption 22:27 active biosorption 24:29 upcoming videos! (and my cat ;) Directly offset your carbon footprint with Wren: https://shrsl.com/3d0t2 Tools I use as a geologist/teacher/student: Geology field notebook: https://amzn.to/3lb6dJf Geology rock hammer: https://amzn.to/3DZw8MA Geological compass: https://amzn.to/3hfbdLu Geological hand lens: https://amzn.to/3jXysM5 Camera: https://amzn.to/3l6fGRT Carbon-neutral backpack: https://shrsl.com/3cvkc Image sources: https://www.futurity.org/wp/wp-conten... http://www.robertlfurler.com/wp-conte... https://i.pinimg.com/736x/61/7b/79/61... https://upload.wikimedia.org/wikipedi... http://www.ices.cmu.edu/images/ceint-... https://www.onlinebiologynotes.com/wp... https://www.researchgate.net/publicat... https://cronodon.com/images/GPW_label... https://www.semanticscholar.org/paper... https://s3-us-west-2.amazonaws.com/co... http://1.bp.blogspot.com/-7mP2st0Oxhs... https://cdn.mos.cms.futurecdn.net/i4q... https://www.researchgate.net/profile/... https://www.researchgate.net/publicat... http://www.northland.cc.mn.us/biology... https://www.researchgate.net/publicat... https://pubs.rsc.org/en/content/artic... Disclaimer: Links in this description may be affiliate links. If you purchase a product or service with the links that I provide I may receive a small commission, but there is no additional charge to you! Thank you for supporting my channel!