PHOTOSYNTHESIS
Photosynthesis <ul><li>Anabolic  (small molecules combined) </li></ul><ul><li>Endergonic  (stores energy) </li></ul><ul><l...
Question: <ul><li>Where does photosynthesis take place? </li></ul>
Plants <ul><li>Autotrophs  – produce their own food  (glucose) </li></ul><ul><li>Process called  photosynthesis </li></ul>...
Stomata (stoma) <ul><li>Pores  in a plant’s cuticle through which  water vapor  and  gases   (CO 2  & O 2 )  are exchanged...
Mesophyll Cell of Leaf Photosynthesis occurs in these cells! Cell Wall Nucleus Chloroplast Central Vacuole
Chloroplast <ul><li>Organelle  where  photosynthesis   takes place. </li></ul>Thylakoid stacks are connected together Gran...
Thylakoid Grana make up the inner membrane Thylakoid Membrane Thylakoid Space Granum
Question: <ul><li>Why are plants green? </li></ul>
Chlorophyll Molecules <ul><li>Located in the  thylakoid membranes </li></ul><ul><li>Chlorophyll have  Mg +  in the center ...
When small molecule combine to make more complex molecules it is a _____reaction <ul><li>Catabolic </li></ul><ul><li>Anabo...
________ reactions store energy <ul><li>Endergonic </li></ul><ul><li>Exergonic </li></ul><ul><li>Anabolic </li></ul><ul><l...
The reactants for photosynthesis are H 2 O, sun, and ________ <ul><li>ATP </li></ul><ul><li>O 2 </li></ul><ul><li>CO 2 </l...
What are the products of photosynthesis? <ul><li>CO 2  + H 2 O </li></ul><ul><li>O 2  + H 2 O </li></ul><ul><li>C 6 H 12 O...
In photosynthesis ____energy is converted to ______energy <ul><li>Solar, heat </li></ul><ul><li>Heat, solar </li></ul><ul>...
Where does photosynthesis take place? <ul><li>Nucleus </li></ul><ul><li>Chloroplasts </li></ul><ul><li>Mitochondria </li><...
Which part of leaves lets gases in and out? <ul><li>Mesophyll </li></ul><ul><li>Grana </li></ul><ul><li>Stoma </li></ul><u...
Why are plants green? <ul><li>Absorb green light </li></ul><ul><li>Reflect green light </li></ul><ul><li>Chlorophyll </li>...
Wavelength of Light (nm) 400 500 600 700 Short wave Long wave (more energy) (less energy)
Absorption of Light by Chlorophyll wavelength Absorption Chlorophyll absorbs blue-violet & red light best violet   blue   ...
Question: <ul><li>During the fall, what causes the leaves to change colors? </li></ul>
Fall Colors <ul><li>In addition to the chlorophyll pigments, there are  other pigments  present </li></ul><ul><li>During t...
Redox Reaction <ul><li>The  transfer  of one or more  electrons  from one reactant to another </li></ul><ul><li>Two types:...
Oxidation Reaction <ul><li>The  loss of electrons  from a substance or the  gain of oxygen. </li></ul>Carbon dioxide Water...
Reduction Reaction <ul><li>The  gain of electrons  to a substance or the  loss of oxygen. </li></ul>glucose 6CO 2   +  6H ...
What types of wavelengths of light have the most energy? <ul><li>Short </li></ul><ul><li>Long  </li></ul><ul><li>Medium le...
What wavelength does chlorophyll absorb best? <ul><li>Green </li></ul><ul><li>Yellow </li></ul><ul><li>Orange  </li></ul><...
In a redox reaction a substance is ______ if it gains an electron(s) <ul><li>Oxidized  </li></ul><ul><li>Reduced </li></ul...
How do plants store energy? <ul><li>In water </li></ul><ul><li>As CO 2 </li></ul><ul><li>In ATP </li></ul><ul><li>In ADP <...
What is added to ADP to make ATP? <ul><li>Oxygen </li></ul><ul><li>Carbon dioxide </li></ul><ul><li>Nitrogen </li></ul><ul...
Question: <ul><li>What do cells use for energy? </li></ul>
Energy for Life on Earth <ul><li>Sunlight  is the ULTIMATE energy for all life on Earth </li></ul><ul><li>Plants store ene...
Structure of ATP <ul><li>ATP  stands for  adenosine triphosphate </li></ul><ul><li>It is composed of the nitrogen base  AD...
Removing a Phosphate from ATP <ul><li>Breaking the LAST PHOSPHATE bond from ATP, will --- </li></ul><ul><ul><li>Release  E...
High Energy Phosphate Bond
FREE PHOSPHATE can be re-attached to ADP reforming ATP Process called  Phosphorylation
Phosphorylation
Parts of Photosynthesis
Two Parts of Photosynthesis <ul><li>Two reactions make up photosynthesis: </li></ul><ul><li>1. Light Reaction or Light Dep...
Two Parts of Photosynthesis <ul><li>2.  Calvin Cycle or Light  Independent Reaction </li></ul><ul><li>Also called  Carbon ...
Light Reaction (Electron Flow) <ul><li>Occurs in the  Thylakoid membranes </li></ul><ul><li>During the  light reaction , t...
Cyclic Electron Flow <ul><li>Occurs in the  thylakoid  membrane. </li></ul><ul><li>Uses  Photosystem I only </li></ul><ul>...
Cyclic Electron Flow Pigments absorb light energy & excite e- of Chlorophyll a to produce ATP  P700 Primary Electron Accep...
Noncyclic Electron Flow <ul><li>Occurs in the  thylakoid  membrane </li></ul><ul><li>Uses  Photosystem II  and  Photosyste...
Noncyclic Electron Flow H 2 O is split in PSII & ATP is made, while the energy carrier NADPH is made in PSI P700 Photosyst...
Noncyclic Electron Flow <ul><li>ADP +    ATP </li></ul><ul><li>NADP +  +  H       NADPH </li></ul><ul><li>Oxygen  comes...
Chemiosmosis <ul><li>Powers  ATP synthesis </li></ul><ul><li>Takes place across the thylakoid membrane </li></ul><ul><li>U...
Chemiosmosis H +  H + ATP Synthase H +  H + H +  H + H +  H + high H + concentration H + ADP + P ATP PS II PS I E T C low ...
Calvin Cycle <ul><li>Carbon Fixation  (light independent reaction) </li></ul><ul><li>C 3  plants (80% of plants on earth) ...
Chloroplast Granum Thylakoid STROMA– where Calvin Cycle occurs Outer Membrane Inner Membrane
Calvin Cycle (C 3  fixation) 6 CO 2 6 C-C-C-C-C-C 6 C-C-C 6 C-C-C 6 C-C-C-C-C 12PGA RuBP 12G 3 P (unstable) 6NADPH 6NADPH ...
Calvin Cycle <ul><li>Remember:  C 3  = Calvin Cycle </li></ul>C 3 Glucose
Photorespiration <ul><li>Occurs on hot, dry, bright days </li></ul><ul><li>Stomates close </li></ul><ul><li>Fixation of O ...
Photorespiration <ul><li>Because of photorespiration, plants have special adaptations to limit the effect of photorespirat...
C 4  Plants <ul><li>Hot, moist environments </li></ul><ul><li>15% of plants ( grasses, corn, sugarcane) </li></ul><ul><li>...
C 4  Plants Mesophyll Cell CO 2 C-C-C PEP C-C-C-C Malate-4C sugar ATP Bundle Sheath Cell C-C-C Pyruvic Acid C-C-C-C CO 2 C...
CAM Plants <ul><li>Hot, dry environments </li></ul><ul><li>5%  of plants (cactus and ice plants) </li></ul><ul><li>Stomate...
CAM Plants Night (Stomates Open) Day (Stomates Closed) Vacuole C-C-C-C Malate C-C-C-C Malate Malate C-C-C-C CO 2 CO 2 C 3 ...
Question: <ul><li>Why do CAM plants close their stomata during the day? </li></ul>
Cam plants close their stomata in the hottest part  of the day to conserve water
What is produced in the light reactions? <ul><li>NADP +  & ATP </li></ul><ul><li>NADP +  & ADP </li></ul><ul><li>NADPH & A...
What is produced in the calvin cycle? <ul><li>Water  </li></ul><ul><li>Carbon dioxide </li></ul><ul><li>Glucose </li></ul>...
Where does the O 2  made in photosynthesis come from? <ul><li>CO 2 </li></ul><ul><li>H 2 O </li></ul><ul><li>The atmospher...
How do CAM plants limit photorespiration? <ul><li>Stomates close in day </li></ul><ul><li>Stomates close at night </li></u...
In Photorespiration ____ is fixed to make 2 carbon molecules <ul><li>CO 2 </li></ul><ul><li>C 6 H 12 O 6 </li></ul><ul><li...
 
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Photosynthesis with turning point qs ppt

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Photosynthesis with turning point qs ppt

  1. 1. PHOTOSYNTHESIS
  2. 2. Photosynthesis <ul><li>Anabolic (small molecules combined) </li></ul><ul><li>Endergonic (stores energy) </li></ul><ul><li>Carbon dioxide (CO 2 ) requiring process that uses light energy (photons) and water (H 2 O) to produce organic macromolecules (glucose). </li></ul><ul><li>6CO 2 + 6H 2 O  C 6 H 12 O 6 + 6O 2 </li></ul>glucose SUN photons
  3. 3. Question: <ul><li>Where does photosynthesis take place? </li></ul>
  4. 4. Plants <ul><li>Autotrophs – produce their own food (glucose) </li></ul><ul><li>Process called photosynthesis </li></ul><ul><li>Mainly occurs in the leaves: </li></ul><ul><li>a. stoma - pores </li></ul><ul><li>b. mesophyll cells </li></ul>Stoma Mesophyll Cell Chloroplast
  5. 5. Stomata (stoma) <ul><li>Pores in a plant’s cuticle through which water vapor and gases (CO 2 & O 2 ) are exchanged between the plant and the atmosphere. </li></ul>Found on the underside of leaves Stoma Guard Cell Guard Cell Carbon Dioxide (CO 2 ) Oxygen (O 2 )
  6. 6. Mesophyll Cell of Leaf Photosynthesis occurs in these cells! Cell Wall Nucleus Chloroplast Central Vacuole
  7. 7. Chloroplast <ul><li>Organelle where photosynthesis takes place. </li></ul>Thylakoid stacks are connected together Granum Thylakoid Stroma Outer Membrane Inner Membrane
  8. 8. Thylakoid Grana make up the inner membrane Thylakoid Membrane Thylakoid Space Granum
  9. 9. Question: <ul><li>Why are plants green? </li></ul>
  10. 10. Chlorophyll Molecules <ul><li>Located in the thylakoid membranes </li></ul><ul><li>Chlorophyll have Mg + in the center </li></ul><ul><li>Chlorophyll pigments harvest energy (photons) by absorbing certain wavelengths (blue-420 nm and red-660 nm are most important) </li></ul><ul><li>Plants are green because the green wavelength is reflected , not absorbed . </li></ul>
  11. 11.
  12. 12. When small molecule combine to make more complex molecules it is a _____reaction <ul><li>Catabolic </li></ul><ul><li>Anabolic </li></ul><ul><li>Spontaneous </li></ul><ul><li>Combustible </li></ul>20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
  13. 13. ________ reactions store energy <ul><li>Endergonic </li></ul><ul><li>Exergonic </li></ul><ul><li>Anabolic </li></ul><ul><li>Catabolic </li></ul>20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
  14. 14. The reactants for photosynthesis are H 2 O, sun, and ________ <ul><li>ATP </li></ul><ul><li>O 2 </li></ul><ul><li>CO 2 </li></ul><ul><li>C 6 H 12 O 6 </li></ul>1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 20
  15. 15. What are the products of photosynthesis? <ul><li>CO 2 + H 2 O </li></ul><ul><li>O 2 + H 2 O </li></ul><ul><li>C 6 H 12 O 6 + CO 2 </li></ul><ul><li>C 6 H 12 O 6 + O 2 </li></ul>20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
  16. 16. In photosynthesis ____energy is converted to ______energy <ul><li>Solar, heat </li></ul><ul><li>Heat, solar </li></ul><ul><li>Chemical, light </li></ul><ul><li>Light, chemical </li></ul>1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 20
  17. 17. Where does photosynthesis take place? <ul><li>Nucleus </li></ul><ul><li>Chloroplasts </li></ul><ul><li>Mitochondria </li></ul><ul><li>ER </li></ul><ul><li>Golgi </li></ul>20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
  18. 18. Which part of leaves lets gases in and out? <ul><li>Mesophyll </li></ul><ul><li>Grana </li></ul><ul><li>Stoma </li></ul><ul><li>Bundle sheath </li></ul>20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
  19. 19. Why are plants green? <ul><li>Absorb green light </li></ul><ul><li>Reflect green light </li></ul><ul><li>Chlorophyll </li></ul><ul><li>Cell walls </li></ul>20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
  20. 20. Wavelength of Light (nm) 400 500 600 700 Short wave Long wave (more energy) (less energy)
  21. 21. Absorption of Light by Chlorophyll wavelength Absorption Chlorophyll absorbs blue-violet & red light best violet blue green yellow orange red
  22. 22. Question: <ul><li>During the fall, what causes the leaves to change colors? </li></ul>
  23. 23. Fall Colors <ul><li>In addition to the chlorophyll pigments, there are other pigments present </li></ul><ul><li>During the fall, the green chlorophyll pigments are greatly reduced revealing the other pigments </li></ul><ul><li>Carotenoids are pigments that are either red , orange , or yellow </li></ul>
  24. 24. Redox Reaction <ul><li>The transfer of one or more electrons from one reactant to another </li></ul><ul><li>Two types: </li></ul><ul><li>1. Oxidation is the loss of e - </li></ul><ul><li>2. Reduction is the gain of e - </li></ul>
  25. 25. Oxidation Reaction <ul><li>The loss of electrons from a substance or the gain of oxygen. </li></ul>Carbon dioxide Water Oxygen glucose 6CO 2 + 6H 2 O  C 6 H 12 O 6 + 6O 2 Oxidation
  26. 26. Reduction Reaction <ul><li>The gain of electrons to a substance or the loss of oxygen. </li></ul>glucose 6CO 2 + 6H 2 O  C 6 H 12 O 6 + 6O 2 Reduction
  27. 27. What types of wavelengths of light have the most energy? <ul><li>Short </li></ul><ul><li>Long </li></ul><ul><li>Medium length </li></ul><ul><li>Length doesn’t have an impact on energy </li></ul>1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 20
  28. 28. What wavelength does chlorophyll absorb best? <ul><li>Green </li></ul><ul><li>Yellow </li></ul><ul><li>Orange </li></ul><ul><li>Blue </li></ul>20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
  29. 29. In a redox reaction a substance is ______ if it gains an electron(s) <ul><li>Oxidized </li></ul><ul><li>Reduced </li></ul><ul><li>Photysynthesized </li></ul><ul><li>Respired </li></ul>20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
  30. 30. How do plants store energy? <ul><li>In water </li></ul><ul><li>As CO 2 </li></ul><ul><li>In ATP </li></ul><ul><li>In ADP </li></ul>20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
  31. 31. What is added to ADP to make ATP? <ul><li>Oxygen </li></ul><ul><li>Carbon dioxide </li></ul><ul><li>Nitrogen </li></ul><ul><li>Phosphate </li></ul>20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
  32. 32. Question: <ul><li>What do cells use for energy? </li></ul>
  33. 33. Energy for Life on Earth <ul><li>Sunlight is the ULTIMATE energy for all life on Earth </li></ul><ul><li>Plants store energy in the chemical bonds of sugars </li></ul><ul><li>Chemical energy is released as ATP during cellular respiration </li></ul>
  34. 34. Structure of ATP <ul><li>ATP stands for adenosine triphosphate </li></ul><ul><li>It is composed of the nitrogen base ADENINE , the pentose (5C) sugar RIBOSE , and three PHOSPHATE groups </li></ul><ul><li>The LAST phosphate group is bonded with a HIGH ENERGY chemical bond </li></ul><ul><li>This bond can be BROKEN to release ENERGY for CELLS to use </li></ul>
  35. 35. Removing a Phosphate from ATP <ul><li>Breaking the LAST PHOSPHATE bond from ATP, will --- </li></ul><ul><ul><li>Release ENERGY for cells to use </li></ul></ul><ul><ul><li>Form ADP </li></ul></ul><ul><ul><li>Produce a FREE PHOSPHATE GROUP </li></ul></ul>
  36. 36. High Energy Phosphate Bond
  37. 37. FREE PHOSPHATE can be re-attached to ADP reforming ATP Process called Phosphorylation
  38. 38. Phosphorylation
  39. 39. Parts of Photosynthesis
  40. 40. Two Parts of Photosynthesis <ul><li>Two reactions make up photosynthesis: </li></ul><ul><li>1. Light Reaction or Light Dependent Reaction - </li></ul><ul><li>Produces energy from solar power (photons) in the form of ATP and NADPH. </li></ul>SUN
  41. 41. Two Parts of Photosynthesis <ul><li>2. Calvin Cycle or Light Independent Reaction </li></ul><ul><li>Also called Carbon Fixation or C 3 Fixation </li></ul><ul><li>Uses energy ( ATP and NADPH ) from light reaction to make sugar (glucose). </li></ul>
  42. 42. Light Reaction (Electron Flow) <ul><li>Occurs in the Thylakoid membranes </li></ul><ul><li>During the light reaction , there are two possible routes for electron flow: </li></ul><ul><li>A. Cyclic Electron Flow </li></ul><ul><li>B. Noncyclic Electron Flow </li></ul>
  43. 43. Cyclic Electron Flow <ul><li>Occurs in the thylakoid membrane. </li></ul><ul><li>Uses Photosystem I only </li></ul><ul><li>P700 reaction center- chlorophyll a </li></ul><ul><li>Uses Electron Transport Chain (ETC) </li></ul><ul><li>Generates ATP only </li></ul><ul><li>ADP + ATP </li></ul>P
  44. 44. Cyclic Electron Flow Pigments absorb light energy & excite e- of Chlorophyll a to produce ATP P700 Primary Electron Acceptor e - e - e - e - ATP produced by ETC Photosystem I Accessory Pigments SUN Photons
  45. 45. Noncyclic Electron Flow <ul><li>Occurs in the thylakoid membrane </li></ul><ul><li>Uses Photosystem II and Photosystem I </li></ul><ul><li>P680 reaction center (PSII) - chlorophyll a </li></ul><ul><li>P700 reaction center (PS I) - chlorophyll a </li></ul><ul><li>Uses Electron Transport Chain (ETC) </li></ul><ul><li>Generates O 2 , ATP and NADPH </li></ul>
  46. 46. Noncyclic Electron Flow H 2 O is split in PSII & ATP is made, while the energy carrier NADPH is made in PSI P700 Photosystem I P680 Photosystem II Primary Electron Acceptor Primary Electron Acceptor ETC Enzyme Reaction H 2 O 1/2O 2 + 2H + ATP NADPH Photon 2e - 2e - 2e - 2e - 2e - SUN Photon
  47. 47. Noncyclic Electron Flow <ul><li>ADP +  ATP </li></ul><ul><li>NADP + + H  NADPH </li></ul><ul><li>Oxygen comes from the splitting of H 2 O, not CO 2 </li></ul><ul><li> H 2 O  1/2 O 2 + 2H + </li></ul>P
  48. 48. Chemiosmosis <ul><li>Powers ATP synthesis </li></ul><ul><li>Takes place across the thylakoid membrane </li></ul><ul><li>Uses ETC and ATP synthase (enzyme) </li></ul><ul><li>H+ move down their concentration gradient through channels of ATP synthase forming ATP from ADP </li></ul>
  49. 49. Chemiosmosis H + H + ATP Synthase H + H + H + H + H + H + high H + concentration H + ADP + P ATP PS II PS I E T C low H + concentration H + Thylakoid Space Thylakoid SUN (Proton Pumping)
  50. 50. Calvin Cycle <ul><li>Carbon Fixation (light independent reaction) </li></ul><ul><li>C 3 plants (80% of plants on earth) </li></ul><ul><li>Occurs in the stroma </li></ul><ul><li>Uses ATP and NADPH from light reaction as energy </li></ul><ul><li>Uses CO 2 </li></ul><ul><li>To produce glucose : it takes 6 turns and uses 18 ATP and 12 NADPH. </li></ul>
  51. 51. Chloroplast Granum Thylakoid STROMA– where Calvin Cycle occurs Outer Membrane Inner Membrane
  52. 52. Calvin Cycle (C 3 fixation) 6 CO 2 6 C-C-C-C-C-C 6 C-C-C 6 C-C-C 6 C-C-C-C-C 12PGA RuBP 12G 3 P (unstable) 6NADPH 6NADPH 6ATP 6ATP 6ATP C-C-C-C-C-C Glucose (6C) (36C) (36C) (36C) (30C) (30C) (6C) 6C-C-C 6C-C-C C 3 glucose
  53. 53. Calvin Cycle <ul><li>Remember: C 3 = Calvin Cycle </li></ul>C 3 Glucose
  54. 54. Photorespiration <ul><li>Occurs on hot, dry, bright days </li></ul><ul><li>Stomates close </li></ul><ul><li>Fixation of O 2 instead of CO 2 </li></ul><ul><li>Produces 2-C molecules instead of 3-C sugar molecules </li></ul><ul><li>Produces no sugar molecules or no ATP </li></ul>
  55. 55. Photorespiration <ul><li>Because of photorespiration, plants have special adaptations to limit the effect of photorespiration: </li></ul><ul><li>1. C 4 plants </li></ul><ul><li>2. CAM plants </li></ul>
  56. 56. C 4 Plants <ul><li>Hot, moist environments </li></ul><ul><li>15% of plants ( grasses, corn, sugarcane) </li></ul><ul><li>Photosynthesis occurs in 2 places </li></ul><ul><li>Light reaction - mesophyll cells </li></ul><ul><li>Calvin cycle - bundle sheath cells </li></ul>
  57. 57. C 4 Plants Mesophyll Cell CO 2 C-C-C PEP C-C-C-C Malate-4C sugar ATP Bundle Sheath Cell C-C-C Pyruvic Acid C-C-C-C CO 2 C 3 Malate Transported glucose Vascular Tissue
  58. 58. CAM Plants <ul><li>Hot, dry environments </li></ul><ul><li>5% of plants (cactus and ice plants) </li></ul><ul><li>Stomates closed during day </li></ul><ul><li>Stomates open during the night </li></ul><ul><li>Light reaction - occurs during the day </li></ul><ul><li>Calvin Cycle - occurs when CO 2 is present </li></ul>
  59. 59. CAM Plants Night (Stomates Open) Day (Stomates Closed) Vacuole C-C-C-C Malate C-C-C-C Malate Malate C-C-C-C CO 2 CO 2 C 3 C-C-C Pyruvic acid ATP C-C-C PEP glucose
  60. 60. Question: <ul><li>Why do CAM plants close their stomata during the day? </li></ul>
  61. 61. Cam plants close their stomata in the hottest part of the day to conserve water
  62. 62. What is produced in the light reactions? <ul><li>NADP + & ATP </li></ul><ul><li>NADP + & ADP </li></ul><ul><li>NADPH & ATP </li></ul><ul><li>NADPH & ADP </li></ul>20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
  63. 63. What is produced in the calvin cycle? <ul><li>Water </li></ul><ul><li>Carbon dioxide </li></ul><ul><li>Glucose </li></ul><ul><li>Sucrose </li></ul>20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
  64. 64. Where does the O 2 made in photosynthesis come from? <ul><li>CO 2 </li></ul><ul><li>H 2 O </li></ul><ul><li>The atmosphere </li></ul><ul><li>C 6 H 12 O 6 </li></ul>20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
  65. 65. How do CAM plants limit photorespiration? <ul><li>Stomates close in day </li></ul><ul><li>Stomates close at night </li></ul><ul><li>Chloroplast rests during day </li></ul><ul><li>Making glucose </li></ul>20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
  66. 66. In Photorespiration ____ is fixed to make 2 carbon molecules <ul><li>CO 2 </li></ul><ul><li>C 6 H 12 O 6 </li></ul><ul><li>O 2 </li></ul><ul><li>H 2 O </li></ul>20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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