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Photosynthesis IGCSE

Revision of photosynthesis

In which cells does most photosynthesis happen? Palisade cells
Which gas is made during photosynthesis? Oxygen
What is the name of the vessel that transports water and minerals in a plant? Xylem
What is the function of chlorophyll? Absorb light energy
Through what structure do gases enter and leave a leaf? Stoma (plural = stomata)
What is glucose stored as in a plant? Starch?
Why do leaves have a large surface area? To absorb as much light energy as possible
What structures contain chlorophyll? Chloroplasts
Which cells do not contain chloroplast in a leaf? Upper epidermis
Which cells contain the most chloroplasts in a leaf? Palisade cells
What substance would you use to detect starch? Iodine
What gas is used during photosynthesis? Carbon dioxide
Whereabouts are most stomata found on a leaf? The bottom
How could you measure the rate of photosynthesis? Count the number of bubbles produced by pondweed or measure the volume of oxygen produced
What test could you carry out to prove that the gas released during photosynthesis is oxygen? Collect the gas and place a glowing splint in it - it will relight in oxygen
Why is it necessary to heat a leaf in ethanol before testing it for starch? To dissolve the chlorophyll so that you can see any colour change with iodine
What are leaves called that contain areas of no chlorophyll variegated
What are the vessels called that transport sugars in a plant called? Phloem
What is the name of the cells that open and close stomata? Guard cells
What process occurs in plants when there is no light? Respiration - this happens during the day as well, but the rate of photosynthesis is faster than the rate of respiration during the day
Created by: northern teacher



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