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What colour does the leaf turn once iodine is added and is no starch?
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Why does the leaf change colour with iodine?
It turns black because starch is present because its making it because of photsynthesis
What parts of a leaf does not react to iodine?
then starch is not present...
What did you see on the leaf in the test tube when testing for starch?
Use iodine to test a leaf for starch | Plant Physiology | Biology
A leaf was taken from a plant boiled with ethanol and tested with iodine solution what is it tested for?
Starch, I think, because iodine solution is the test for starch.
Rahul picked up a dry leaf from the school garden and tried doing the iodinetest he objerved that the colour of iodine did not turn bluish black can you explain why?
because it is a dry leaf.
Why did the leaf turn blue black when iodine was added in the starch test?
because photosynthesis has occured in the leaf. starch is produced and turns iodine blue-black indicating the presence of starch.
What observations do you need to expect if starch is present when testing leaf for starch?
It can be observed that when testing for starch their must be a olour change of blue black after iodine solution was added.Before the colour change was green that changed to blue black of the whole procedure is been carried out.
What is the role of iodine in testing a leaf for starch?
A hot bath of ethanol decolorizes the leaf by washing out the chlorophyll. If the leaf is not decolorized, you cannot see the blue-black stain that results from the iodine reacting with the starch.
When poured iodine on leaf why it changes?
If you add iodine to a leaf, a black color will show that starch is present
What is the color of the leaf at the end of the experiment that test for starch?
the color of the leaf become brown-black after the iodine solution was added.
Why does the leaf change colour with iodine?
It turns black because starch is present because its making it because of photsynthesis
What effect does iodine have when added directly to a leaf in an experiment?
it becomes blue black showing that starch is present.
What is the purpose of covering the leaf with iodine?
if you cover a boiled leaf in iodine you can see how much starch is in the leaf
Why do green leaves turn blue black when iodine is added?
because the leaves have photosynthesized- glucose is produced. therefore, the excess glucose is converted to starch. The starch is then stored in the leaf-starch is what causes the "green" leaf to turn blue black, as iodine turns blue-black when it reacts with starch.:P
Rahul picked up a dry leaf from the school garden and try doing iodine test he observed that the colour of iodine did not turn blue or black can you explain why?
because the leaf doesnot contain starch in it
What is the answer A leaf was tested for starch the iodine solution stayed orange what does that tell you about the leaf?
the iodine stayed orange because the starch wasn't present
What does the presence of blue color means in variegated leaf experiment of photosynthesis?
By blue color I assume you mean an added dye that shows how some parts of the leaf can photosynthesize and others not. The easiest of these experiments is to place the leaf in boiling ethanol (alcohol) and when drained of colour spread out on a flat surface. Soak the leaf in iodine and the green parts will turn blue/black and the non green parts will stay the yellowish brown colour of iodine. The green parts contain starch (a more compact form of glucose) which makes iodine turn blue/black. The blue/black is what will show starch is present.
