requirement: chlorophyll

• practical: why do plants need chlorophyll (4)

  1. use a variegated leaf which has already been exposed to light for a while
  2. record which parts of leaf are green and which arent
  3. test leaf for starch+youll notice only parts which were green turned blue black
  4. this indicates that only parts of leaf which contained chlorophyll (green bits) are able to photosynthesize+produce starch
• test self (hint)

  1. variegated leaf with light
  2. record leaf
  3. test leaf for starch
  4. this indicates..
• why does the white part of leaf turn yellow/ orange

  as the odine solution used to test for starch is brown and so stains them
• 1st step

  use a variegated leaf which has already been exposed to light for a while
• 2nd step

  record which parts of leaf are green+which arent
• 3rd step

  test leaf for starch+you will notice only green parts of leaf turn blue black
• 4th step


  this indicates that only part of leaf which contains chlorophyll (green part) is able to photosynthesize+produce starch
• how many steps in this practical

  4
• why does the white part of variegated leaf turn yellow/ orange

  as iodine solution is brown + it stains it