39529311
Description
| Question | Answer |
| D: METABOLIC REACTIONS? | They are all the biochemical reactions that take place in the cells of living organisms. |
| D: ENERGY FROM THE ELECTROMAGNETIC WAVES FROM THE SUN...? | Gradient Energy |
| D: AN ORGANISM ABLE TO PRODUCE ITS OWN FOOD? | Autotroph |
| D: HETROTROPH? | Organism that needs to consume food for energy. |
| D: POSITION AN ORGANISM OCCUPIES IN A FOOD CHAIN? | Trophic Level |
| WHAT ARE THE PRODUCTS AND REACTANTS OF PHOTOSYNTHESIS? | Products: Oxygen and Glucose Reactants: Carbon Dioxide and Water |
| WHAT 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 |
| WHAT IS THE WORD EQUATION AND NORMAL EQUATION FOR PHOTOSYNTHESIS? | water = carbon dioxide ( radiant energy)--> glucose + oxygen H2O + CO2 ( radiant energy) ---> C6H12O6 + 6O2 |
| D: WHAT IS AN ANABOLIC PROCESS? | It's when small simple molecules are synthesised into large complex molecules. |
| HOW DO GASSES ENTER AND LEAVE THE PLANT? | They do so via stomata found on the underside of leaves; surrounded by 2 guard cells each. |
| WHAT 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 |
| D: WHAT IS THE GREEN PIGMENT THAT ABSORBS LIGHT ENERGY? | Chlorophyll |
| WHAT 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 |
| WHAT 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. |
| D: WHAT IS STARCH? | It is stored energy in the plant. |
| WHERE DOES THE LIGHT INDEPENDENT PHASE TAKE PLACE? | It takes place in the grana. |
| EXPLAIN IN DETAIL THE LIGHT PHASE. | notes |
| WHERE DOES THE DARK PHASE TAKE PLACE? | In the stroma. |
| EXPLAIN DARK PAHSE IN DETAIL. | NOTES |
| WHY IS PHOTOSYNTHESIS IMPORTANT. | -produces oxygen -uptake of carbon dioxide -production of food |
| WHAT IS A LIMITING FACTOR? | It is factors that limit the rate of photosynthesis. |
| NAME FACTORS THAT AFFECT THE RATE OF PHOTOSYNTHESIS. | -light intensity -carbon dioxide concentration -temperature |
| IF 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. |
| WHY 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. |
| WHAT IS THE OPTIMUM TEMPERATURE FOR PHOTOSYNTHESIS? | 37C |
| WHAT HAPPNES IF THE TEMPRATURE GETS TOO HIGH. | The enzymes become denatured causing photosynthesis to slow down and eventually stop. |
| WHAT 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. |
| HOW 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 |
| WHAT DOES ATP STAND FOR? | Adenosine Triphosphate |
| WHAT 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. |
| WHAT IS ATP MADE UP OF? | It is made up of, adenine(nucleotide); a ribose sugar and 3 phosphate molecules |
| WHAT 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. |
| WHAT DOES ADP STAND FOR? | Adenosine Diphosphate |
| WHERE 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. |
| WHAT ARE THE USES OF ENERGY RElEASED FROM ATP? | -Contraction of muscle cells -Active transport -Bioluminescence -The synthesis of macromolecules |
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