Exam 1 Key

Exam 1 Key - ENH 102 First Mid-Term Exam October 14, 2010...

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ENH 102 First Mid-Term Exam October 14, 2010 Your Name ___ Expected Answers ____ [7] List two (2) factors that can affect plant membranes? Pick one of those you’ve listed and explain how it affects the membrane. temperature - fatty acid arrangement, fluidity ionic concentrations - if [Ca ] increases -> membrane rigidity 2+ light - too much -> photoinhibition of membrane-bound proteins and pigments growth regulators - increased concentration -> increased membrane fluidity Others were accepted as well. [6] How do primary and secondary cell walls differ? How are they the same? Differ in ratio of cellulose and hemicellulose; primary cell walls have embedded proteins while secondary cell walls done; secondary cell walls have lignin while primary cell walls don’t [5] List three (3) roles proteins play in membrane function? House ETC of photosynthesis House ETS of respiration Facilitate uptake, exclusion and/or retention of surrounding substances Recognition systems Site of action for growth substances [8] List 4 membranes or membrane-bound organelles in the plant cell. Plasma membrane, tonoplast, thylakoid, nuclear envelop, root hair,
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This note was uploaded on 11/12/2010 for the course ENH 102 taught by Professor Burger,d during the Fall '08 term at UC Davis.

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Exam 1 Key - ENH 102 First Mid-Term Exam October 14, 2010...

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