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Flashcards

PHOTOSYNTHESIS

Arabella Fernandes LIFE SCIENCES caps English 35 cards

Cards in this deck (35)

  1. 1D: METABOLIC REACTIONS?They are all the biochemical reactions that take place in the cells of living organisms.
  2. 2D: ENERGY FROM THE ELECTROMAGNETIC WAVES FROM THE SUN...?Gradient Energy
  3. 3D: AN ORGANISM ABLE TO PRODUCE ITS OWN FOOD?Autotroph
  4. 4D: HETROTROPH?Organism that needs to consume food for energy.
  5. 5D: POSITION AN ORGANISM OCCUPIES IN A FOOD CHAIN?Trophic Level
  6. 6WHAT ARE THE PRODUCTS AND REACTANTS OF PHOTOSYNTHESIS?Products: Oxygen and Glucose
    Reactants: Carbon Dioxide and Water
  7. 7WHAT ARE THE FACTORS REQUIRED FOR PHOTOSYNTHETIC REACTIONS TO TAKE PLACE?- Raw materials: water(roots, carbon dioxide (stomata)
    -Radiant energy: sun
    -Enzymes: to catalyse the reactions
  8. 8WHAT IS THE WORD EQUATION AND NORMAL EQUATION FOR PHOTOSYNTHESIS?water = carbon dioxide ( radiant energy)--> glucose + oxygen
    H2O + CO2 ( radiant energy) --->
    C6H12O6 + 6O2
  9. 9D: WHAT IS AN ANABOLIC PROCESS?It's when small simple molecules are synthesised into large complex molecules.
  10. 10HOW DO GASSES ENTER AND LEAVE THE PLANT?They do so via stomata found on the underside of leaves; surrounded by 2 guard cells each.
  11. 11WHAT ROLE DO GAURD CELLS ( GC) PLAY SURROUNDING THE STOMATA?-when GC gain water they curve outwards which opens the stomata allowing gasses to move in and out
    - when GC loose water they come closer together closing the stomata; preventing the movement of gasses and water loss
  12. 12D: WHAT IS THE GREEN PIGMENT THAT ABSORBS LIGHT ENERGY?Chlorophyll
  13. 13WHAT ARE 5 LEAF ADAPTATIONS FOR PHOTOSYNTHESIS?- the leaves have a large and flat surface area allowing for max. light absorption
    -the cuticle and epidermis is transparent to let light through
    -they have stomata which allows gasses to move in and out
    -they are thin which allows light to penetrate all cells
    -they have veins which support the leaf and carry water to all cells and carry glucose away
  14. 14WHAT DO ENZYMES DO IN PHOTOSYNTHESIS AND WHAT HAPPENS IF THEY REACH ABOVE AN OPTIMAL TEMPERATURE?They act as a catalyse for all reactions and will become denatured if they reach about their optimum functioning temperature.
  15. 15D: WHAT IS STARCH?It is stored energy in the plant.
  16. 16WHERE DOES THE LIGHT INDEPENDENT PHASE TAKE PLACE?It takes place in the grana.
  17. 17EXPLAIN IN DETAIL THE LIGHT PHASE.notes
  18. 18WHERE DOES THE DARK PHASE TAKE PLACE?In the stroma.
  19. 19EXPLAIN DARK PAHSE IN DETAIL.NOTES
  20. 20WHY IS PHOTOSYNTHESIS IMPORTANT.-produces oxygen
    -uptake of carbon dioxide
    -production of food
  21. 21WHAT IS A LIMITING FACTOR?It is factors that limit the rate of photosynthesis.
  22. 22NAME FACTORS THAT AFFECT THE RATE OF PHOTOSYNTHESIS.-light intensity
    -carbon dioxide concentration
    -temperature
  23. 23IF LIGHT INTENSITY BECOMES REALLY HIGH WHAT HAPPENS TO THE RATE OF PHOTSYNTHESIS?When the light intensity becomes too high rate of photosynthesis levels off as the stomatas close causing CO2 to become a limiting factor.
  24. 24WHY DOES THE RATE OF PHOTOSYNTHESIS EVENTUALLY LEVEL OFF EVEN THOUGH THERE IS PLENT OF CO2?Light intensity then becomes a limiting factor causing the rate of photosynthesis to level off as CO2 is increasing but light intensity is staying at a constant level.
  25. 25WHAT IS THE OPTIMUM TEMPERATURE FOR PHOTOSYNTHESIS?37C
  26. 26WHAT HAPPNES IF THE TEMPRATURE GETS TOO HIGH.The enzymes become denatured causing photosynthesis to slow down and eventually stop.
  27. 27WHAT DOES THE PRODUCTIVITY OF A PLANT REFER TO?It refers to the amount of dry mass (mass of plant minus its water content) that it gains over a period of time.
  28. 28HOW DO GREENHOUSES INCREASE PRODUCTIVITY?-Glass: inc. temp and light intensity
    -Gas cylinders: releases more CO2
    -Effective watering system: less transpiration due to humidity
    -Insect control: insecticides are related inside
  29. 29WHAT DOES ATP STAND FOR?Adenosine Triphosphate
  30. 30WHAT IS THE FUNCTION OF ATP?It is used as cells immediate source of energy for all metabolic activities and moves around the cell to where energy is needed.
  31. 31WHAT IS ATP MADE UP OF?It is made up of, adenine(nucleotide); a ribose sugar and 3 phosphate molecules
  32. 32WHAT IS ATP HYDROLYSIS?The bond that links the last 2 phosphate molecules is unstable, so during hydrolysis that bond is broken releasing chemical energy. Leaving ADP and one free phosphate molecule.
  33. 33WHAT DOES ADP STAND FOR?Adenosine Diphosphate
  34. 34WHERE DOES ATP SYNTHESIS OCCUR AND WHAT DOES IT DO?It is the build up of ATP and occurs in the light independent phase of photosynthesis.
  35. 35WHAT ARE THE USES OF ENERGY RElEASED FROM ATP?-Contraction of muscle cells
    -Active transport
    -Bioluminescence
    -The synthesis of macromolecules

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caps LIFE SCIENCES Flashcards on PHOTOSYNTHESIS, created by Arabella Fernandes on 15/05/2024.
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