Week Answers

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TA:ZaraTabi([email protected]) AIM:ztabi06 Details TheNittv-Grittv Photosvnthesis:

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phosphates, (intheformofhighenergy whenATP) AMP)? -Whydoitwhenit usesupmoreenergy Makes PROCESS: a MORE EFFICIENT 1)PEPCarboxylase hasa higher forCOz incomparison affinity toRubisco 2)Createanenvironmentof high[CO2]tofavorCO2fixationoverphotorespiration +t/7 &tat//ee?ZlV a&s helps recapture 3i Arrangement ofcells(C4orkrinzAnatomy) CO2thatmayhavebeenlostduring/ut/t/, ,h4rsoo photorespiration /u a2/77't/ b/.ntrltn 6ua op2 ,fl ffu,4

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more often) lessH2Ol'oss! CO2lossisrcduced, canclose stomata - Because . ldealforplants thatliveinareas ofhighlightandtemperature, where rateofphotorespiration increases Millet, ex.TropicalGrasses-Maize, Sugar Cane, etc.

version ofC4photosynthesis Analternate PhotosynthesisAcidMetabolisd CAMGrassulacean andNight separated-Day aretemporally - C4andC3Reactions

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pHwillusually atnight, belower (malic inthevacuole acid) stored high[] ofmalate - Because - Whydiditevolve? withliftlerainfall thatliveindrylocations ' Helpplants waterloss) Canstillperform C3photosynthesis toprevent thedaytime during stomata closed - Keep C4photosynthesis iscooler totakeinCO2toperform whentemperature - Openstomata atnight . ex.Cacti, pinepple succulents, tothinkabout: Productivity, GlobalWarminqQuestions Primarv productivity? - Definition forprimary Least atfixing CO2? efficient? (C3,C4,CAM, etc.)arethemostefficient - Whattypes ofplants peryear? plays themostcarbon roleinfixing animportant ecosystem - Whatcontinental gas gallon used? of for every are released ofCO2 - HowmanyPounds given (Referr lecture!) on10i08109 tothehandout

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