paper 1 corrections!(2020)

• what is the leaves the site of?

  photosynthesis
• what do leaves require lots of?

  carbon dioxide+water
• the many stomatas are scattered through??

  the lower surface
• what happens once the carbon dioxide diffuses?


  it moves up the leaf

  enters the spongy mesohpyll tissue

  then moves to the palisade mesophyll tissue
• what happens in the palisade mesophyll tissue?

  most photosynthesis
• what are the palisade cells packed of??

  Chloroplasts
• what happens in the upper epidermis?

  most transparent

  sunlight needs to be able to pass through them,to go to the palisade cells beneath
• lock and key theory?

  starch/substrate binds to active site of enzyme,shape of enzyme active site

  substrate are complementary

  a chemical reaction occurs to produce smaller molecules

  bonds between starch molecules are broken to produce small molecules
• what happens when photosynthesis has produced a sugar molecule?


  they are carried through the phloem