Testing leaves for starch Flashcards
1
Q
what is the first step of testing the leaf
A
placing it in boiling water for 30 seconds
2
Q
why do we place leaf in boiling water
A
kill cells prevent further chemical reactions
3
Q
what do you do with the leaf after it has boiled
A
place in ethanol in a water bath
4
Q
why place leaf in ethanol
A
dissolve chloroplasts to remove green colour so we can see results clearly
5
Q
what do you do after leaf discoloured
A
add iodine if it turns blue black then starch present
