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Download Bacteria Coloring Packet Follow-up Integrated Science 2 Name
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BacteriaColoringPacketFollow-up IntegratedScience2 Name: Date: Pd: Directions:UsingyourBacteriaColoringPacket,boththereadingandthecolorplates,answerthefollowing questionsaboutbacteria,theirstructureandhowtheyreproduce. FormsofBacteria 1.Thethreebacterialformsare:_________________,____________________and____________________. 2.Drawandlabelasampleofeachofthethreetypes,andgivetheirapproximatesize. 3.Ofthethreeforms,whicharesmallest?___________________whicharelargest?__________________Howmany timeslarger?____________times. 4.Whatdoestheprefix“strepto”mean?_____________________________________________________________ 5.Basedonyouranswerto#4,whatdowededuceabout“streptococcus”,oneoftheculturesusedtomake yogurt? BacterialUltrastructure 1.Theflagellumisusedforonepurpose,whatisit?_______________________________ 2.Whatpartofthebacteriumisdamagedbydetergents?________________________________ 3.Pili(pluralofpilus)areoftenconfusedwithflagella,buttheyhaveaverydifferentpurpose.Whatdothe pilidoforthebacteria? 4.Howmanychromosomesdoesabacteriumhave?_________________ 5.Inadditiontothechromosome,bacteriahaveDNAindozensofplasmids.Describethisanddrawan example. BacterialReproduction 1.Asexualreproductionofbacteriaiscalled________________________________. 2.Binaryfissionoccursafterthecellhashadaperiodof_______________________and____________________. 3.Bacteriagothroughsimilarreproductivestagesasbodycellsdoinmitosis.Listthestepsbelow. First)Bacteriumelongates Last)cellseparatesintotwohalves(daughtercells)withidenticalDNA. 4.Howdoespenicillindisruptbacterialreproduction? Whatultimatelyhappenstotheexposedcell? 5.Theamountoftimeneededforbacteriareproductionisuniqueforeachspecies.Howlongdoesthe examplebacteriaonthecolorplateneedtoformdaughtercells? Let’sassumethatyoucollect10livebacteriaonyourpetridishatnoon.Howmanycellswillyouhaveby5 PM?(careful!It’snotjust10x5!)Showyourwork. Bonus:Howmanyafter24hours? BacterialSpores 1.Whywouldabacteriumproducespores? Givesomeexamplesofplaceswheresporesareknowntohavesurvived. 2.Whathappenswhentheexternalenvironmentforasporeisfavorable(stabletemperature,nutrients, hydration)? 3.Someofthebacteriathatwepickeduparoundcampuswereactuallybacterialspores.Whyarewe sometimesmorelikelytopickupsporesthanlivebacteria? Why,then,wereweabletoseesomuchbacteriainourpetridishesonthe2nddayofthelab?
