3060 spring06 exam2

3060 spring06 exam2 - PLANT PHVSIOLOGY 3060 EXAM 2 - March...

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Unformatted text preview: PLANT PHVSIOLOGY 3060 EXAM 2 - March 14, 2006 Read each question carefully before answering, you are responsible for answering ail parts of each question. Write cleariy with proper spelling and grammar. You may continue answers on the back of exam pages but the locations must be clearly marked. Ribuiose 1,5-bisphosphate is abbreviated as RuBP and ribulose 1,5-bisphosphate carboxylase/oxygenaSe is abbreviated as rubisco and phosphoenolpyruvate carboxylaSe is abbreviated as PEP carboxylase. I 1., {20 pts) Give the word or phrase that best fits the following descriptions: A ' LN? 9’ a: Class of membrane transport proteins that depend on conformation or shape change. -':- ‘7 1...: 3; Reaction center of photosystem I. Cc ' An accBSSOY‘Y pigment for Phofosymhefls in higher Plums. If The Nernst Equation predicts , E. In a C4 plant, PEP carboxylase is found in cells. F. Oligosaccharide found in the sieve elements of some plants. 6. Term for a plot of photosynthetic rate versus wavelength of light. lHr.’ '- An amino acid that is an intermediate in photorespiration. I, "gite of sucrose formation in a photosynthetic cell. .‘ I A nitrogen containing compound found in sieve elements. For the following five questions, circle the letter for the best answer. Each question is worth 2 points. '. A‘, l' its A”:th We: ‘7 “3"”; i”? “ V ‘ 2. Experimental proof of chemiosmosis is most clo5ely‘associated with a.EeterMitchell a; j? John Bayer r l, a. I; W C. MelVlfl - 1 3‘ Arte ails Flu? ki’findre Jogendorf- K x e. Linus Pauling Plant Physiology —- Exam II Page 2 3. The substrates (normal reactants) for the enzyme PEP carboxylaSe are ___. a. 602 ond'RuBPr— b. C02 and phosphoenolpyruvase» oil—{C03 and RuBP l‘HCOa 9nd phosphoenolpyruvate A, e. ’HCO: and malate ' at A “fine control" of sucrose synthesis in a photosynthetic cell. a. suc_rose , 7 biractgsgjfipisphosphate _c. fructOSe 6 phosphate 3; fructose 2,6 bisphosphate e. triose phosphate A Use the letters on this diagram to answer B questions 5-6. An answer may be used more than once. 6 5. Site of Calvin Cycie enzymes Q . \k 6. Site of the lowest concentration of protons in the light . E (8 pts) The formation of a triose phosphate by the Calvin Cycle requires a great den! of energy. (a) What type of molecules provides the energy to drive triose phosphate formation? (b) How many of the molecules described in "a" are required to drive the formation of a triose phosphate and in what phases of the Calvin Cycle are these molecules I _ (‘1 A fl _ I _\ ‘,\ mm d I . (\ \ (x i‘ d 5 /"‘ fl ’ xx % — > V 3 ‘ w 4 ” x. A K \ \ f .' 5Q?" -\ ,“ a \ \ "It‘ur, \ K" H L ’\ T ‘13 551ng Lx<l( 7!” “Tana flag 1 v :‘Flffi Plant Physiology — Exam II Page 3 8. (12 pts) A pea seedling is submerged in a solution in a small dish and a microelectrode is inserted into a cell on the seedling‘s epidermis. The measured potential across the eel? membrane is —130 mV but the Goldman Equation predicts a potential of -50 mV. (:1) What information was needed to calculate the Goldman value? (b) What causas the difference between the measured and calculated values? (c) What would be the effect on the difference between the measured and calculated values if cyanide was added to the solution surrounding the seedlings? Why? (d) How can the difference between the measured and calculated values affect the uptake of K‘ by this cell? 7 .5- -s l l‘ J v ‘v c: f'i316\.3cifi " y:.‘.,'-a~r,.r ti 5 -'§ ' V q. 4 c 'e-L ‘vn‘f‘.'- L I I‘- a. ' ‘ L ': Lqu’GH ’ l i l J ' e' J 2 I i I ‘ . ‘l i . . It ‘ 5‘ . l t 1 _ V . r /l, E .. . . . one.“ _.u . _ t. V V L“ [fy_ * H’s :cviiuu -;. “,7 I _; : [{M‘IH'J‘ "fir lid“ «4.x ix \t < J J k». :4 Art k r .67 .{( 1w ‘Yiil l x'lu _l ‘,,I\_ it“; hf; ;. -‘twilithHm,» (8 pts) Electron transport in the light reactions of photosynthesis is coupied to the formation of ATP. (a) What provides the energy that drives photosynthetic electron .. ' transport? (b) Specifically, what happens during electron transport that provides the energy for M1” formation? (c) Describe how ATP is formed in the chloroplast. Relate your answer to the structure of the chloroplast. _ _ o a G, l / ‘jw a! “.4. .("".a; q '4 - ‘ ~...f":‘;_l- {C- - I‘ I i 7 xx; ‘ A used to who»? A w'iw-d’t'fl‘t' ~‘“~‘~'— W» t 5‘5 T; y’ 1/1 / .2? ‘S: ta 1;; t I r,“ f i C x A » a“ L 5:14 (U 43- id (L e R "l r ‘\ f”; "7’ ' . \ + x c. L_. La L , :1, .d “Cf—£71.”! I In. I J," I“ l 1“ ° 1 k I I h Pram“ L¥r‘/d:._.\ll 3% L‘ci‘frkjgjigé‘kgfi :NU/V i . "- I‘ I .l "H_ ‘1} :/’€ {MW-Mum '/”L‘r\ fixer PM}. Zflrbt” PFJ‘$"\\ In Mata c, J , n ~ t - .sc 4 + L\r\ * 'fi \ Him at: (.J’I‘L"\ feted: chi -«_‘ 'l’ mag/lug +_ ‘3 It . I_ ' if ,U Apt [La 4m_:~\ , F3 Jr\ {— ,1 :f k; 4 ‘ "‘iV‘L‘L _ a i x d L s 53:9v‘ g l 3' l; t Plant Physiology - Exam II Page 4 10. (12 pts) An acquaintance shows you a plant that was collected from a warm and Sunny environment and asks you if you could determine if it was a C4 plant. (a) What structural features would you look for to help determine if the plant was C4 or CB? Explain what this information would mean. (b) You have an apparatus that measures leaf photosynthesis and is capable of controlling and changing the 602 concentration over the leaf. How would you expect a C4 and a CS plant to differ in terms of CO; compensation points, maximum photosynthetic rates and photosynthetic rates at normal atmospheric C02 concentrations? . k . .114“; "JF‘P \.i.‘ \-i\ I (“may . '- 5' ‘\ -’ r i ‘1. .' xx; ‘gc ‘ c l oi: ‘ l I] _ V {‘ICHLflII‘f J .‘r,\l L‘\'\.’l “LVN ’c 'K=<_‘“\:.’l/ ' AMIGA "\ ‘ JM‘" ' . "(iv ‘1' i” . r I n. l - k" , /"«, fii‘('\~‘\+l‘-; 0.1": “cl "7" Huxc‘fil ii. i - L r k)‘> I . if: r _/ Kl”: A {Jail-X ’11- C" 1<l ., . {\i'{‘\\_‘<’ e; nepffv I; I. so ‘ I - I /- , , B \*-‘ L\ i-’ , ' . , x. — A, r i ; \_,\ ,z \ 7“: JV m, H Il‘f‘r\ F “,3 T ,h \ r f, - ( r r“ . 2 ‘ 3 - N ,. H i . x x. x i Jim . 7—45,” _ .— _- I p own. LA; J A J r E“: i-w‘iqw H ~ . . - "‘ -' s. l c ~ ,. w .63 - i .r . ‘ y\ *3 r “A \ ‘JL 4 j".- —-\ 7 .3 \:‘_,\j r 4 ‘J \ .Hr‘; ’f l l \ I! i\:1u \Lc‘) «» r x 11. (8 points) The figure to the right plots C02. concentration at 37” Mama Loa’ HA several times during the year from an observatory in Hawaii. (a) g. Why is the concentration increasing from year to year? What ' causes the annual variation? (b) Johnson grass, a C4 plant, grows more rapidly than soybean, a C3 plant. Based on photosynthesis, how would you expect this relationship to change in the future? §§§E €02 Concentration (ppm) Liliv "L - i" l“\"“"‘l" 1' ‘ “ -‘ ‘ . a W 320 “HA :Q q‘ 4“ rkA \ > " r . ,- :2. l‘- 5‘! if ' ‘ 3m ' “gym” ideas; A,/ "\Ufl kgp \3. U» ' * I 1960, 1970 198a mo 2000 e ,r'y ~71 ,‘J' ‘3’; ‘\!-- J :5 Lil (f fer 5-7"» s_‘i'\~"-ll "; 'i I 1 ' ; v . :1 7 s 3 no»: A . V. < - ’ -- ‘ l’ 1U") HE i-.‘_.L L. -. \ “\- ‘\ Fl ufldr ./ “A ill/“JHCF H L3.“ U. Iri Tc‘..\_ / i1. fl . _ .. Plant Physiology - Exam II Page 5 12. (12 points) The osmotic adjacent mesophyll cell two cells is established. potential N.) in a sieve tube element is 4.7 MPa while in an 'l’. = -1.0 MPa (0) Explain how the difference in 9’, between these (b) If these cells are in source tissue, water potential? Why? (c) How does t ' potential between these two types of cells lead to transport in the phloem? ,r- t |- i, , ' i. 3 - v _ — v“-.’ E 1». 3 ‘ * g is E; if " 415:4: We‘d 4‘; ' if" 5 JV; 1 J'\ t ‘ _ .1 \J “- 'r—Zi (5". S 53:: lb“: ._-: 'L‘VHEHJ 4. ’ WS’T‘L‘r—li SFSLWV ‘. d e ! 5: tDL-l' u." firth" (gnu-4:. Z’WU‘I” ’- (‘1‘ fflx‘ 1.; {I I “of , I A t *7 _ _ i I L "1 ‘ K ’ ‘ r J5? s ’ :_ i ‘_ ~ ‘ ‘ ’ :‘\ ' _“ \f 1KL} l k 3’ 1‘, ' e ; , t ‘ . . _/ , ,t but? .» r L113 .531. ',r am one“; suturedéd it“ “NP 3“ 3' 3m; \.J C “32;: i _ " " :13 ?r'\. s\ .“A Loafer “vi‘i'ldcg 9‘0 A“ ~ - l» an: 1‘?‘ I e {— xiv i L7» ' - a , hf #7 (*4: L7 I ‘Lfe': ‘7 (\J‘f‘: ‘ "‘ " ‘ MIL: If LG.“ ; : I h 7 ‘1 LU h k. i "1‘ i ‘7 ‘ .. - J. 7 fl ‘ . [N‘Cw‘l‘ Nil; 431‘: .91 7;: 'Li':~'\ "If"; )Lt‘g‘QQg‘file if H :"3n 4“ ‘ ‘ -r l A’l ‘3 L + “'5 ,1 ‘ r; q,‘ \ ‘ ,“‘l .11 f I \J r i ~- -¥ ‘v r h F x, 3 "7‘55; .3qu ~ ’3':ng l 3 “rd/h. , ' I ' I L - k ‘, t J i 53 (H , in ‘ y . V A. n J 13. (10 points) Carbohydrates can be ‘loaded' into sieve tube elements via either an apoplastic or a symplastic pathway. (a) What is 'polymer trapping"? Be sure to include in your description the necessary structural features needed for ‘poiymer trapping”. (in) How does 'polymer trapping‘ allow for the Simultaneous diffusnon of carbohydrates from p otosynthetic cells to the companion cell/Sieve element complex (CC/SE) and concentration of carbohydrates «1 the CC/SE Without a membrane barrier? l r . ' f i ‘ ‘f'jw‘; ‘\ t" \ m if“? ' 3‘ “30. 'll’til“?fx“ filp'frr‘et‘L-a' v ‘ k f ' 4" 7 '\ \r»~’-‘\ ’.~- A " _ A .. 4., t f- a e x « a v ‘ l 7 #313 i H K4 « 1 i ,7 ;- i e O 3 -rt- / fl er 1 c < «T ' ‘ d. , s :3 a ‘3 Hi: ’33 ixm la; 4"" [C E : f ., x K - , kl ' s ~ e v L ’ r 1', ' ...
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This note was uploaded on 11/29/2011 for the course BIOL 1001 taught by Professor Minor during the Fall '08 term at LSU.

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3060 spring06 exam2 - PLANT PHVSIOLOGY 3060 EXAM 2 - March...

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