1) In which part of a plant does most photosynthesis occur? a) Stem b) Root c) Leaf d) Flower 2) How do you destarch a leaf? a) 12 hours in the dark b) 24 hours in the dark c) 48 hours in the dark d) 1 month in the dark 3) During the day, the carbon dioxide concentration around a plant will be... a) higher than at night b) lower than at night c) the same as at night d) the same throughout the day 4) A leaf is placed in boiling ethanol to do what? a) kill the leaf b) soften the leaf c) remove the chlorophyll d) test for starch 5) Iodine a) tests for starch and goes red if present b) tests for glucose and goes blue-black if present c) tests for starch and goes blue black if present d) tests for sucrose and goes orange if present 6) When testing for starch what must you do before ethanol comes out of the tube? a) Turn off the bunsen b) Add iodine c) Add water to soften the leaf 7) Which one is not needed for photosynthesis a) sunlight b) water c) oxygen d) chlorophyll  e) CO2 8) When investigating factors needed for photosynthesis, how many are removed at once? a) Just one b) Any two  c) Up to three d) all four e) As many as you want 9) The stencil experiment proves a) That light is needed for photosynthesis b) That carbon dioxide is needed c) That chlorophyll is needed 10) The control in the stencil experiment is transparent polythene. This proves a) That starch is not made when the leaf is covered in any way b) That the act of just covering the plant is not causing the absence of starch, it is the absence of light c) That carbon dioxide does not affect this experiment 11) Potassium hydroxide, sodium hydroxide and soda lime a) remove light b) remove CO2 c) remove chlorophyll 12) The elodea experiment to prove oxygen is released uses plasticine- what is it for? a) allows flow of gases b) removes CO2 c) adds oxygen d) prevents the plant getting too much light 13) The test for oxygen is a) limewater- goes cloudy b) relights a glowing splint c) pops with a lit splint d) turns cobalt chloride paper pink 14) In an experiment to see if CO2 is needed for photosynthesis, a polythene bag is placed around the soil to a) stop the soil drying out b) make sure CO2 is not added by respiring organisms c) prevent light reacting with the soil d) keep oxygen from the soil 15) What type of leaf is used to see if chlorophyll is needed? a) verity b) variety c) veriegated d) voracious e) veloiciraptor f) verisimilitude 16) Sodium hydrogen carbonate, NaHCO3, is used in photosynthesis experiments to a) add oxygen b) remove carbon dioxide c) add carbon dioxide d) add water e) remove water

Ffynone House: AQA biology: Photosynthesis experiments

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