Black/Dark purple.
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∙ 2012-05-29 21:18:34The seed uses the starch until it become an adult plant or in other words, until it is fully grown to produce its own food. Inside the cotyledon, starch is present and thus, gives a positive result for starch :)
A pregnancy test can show a positive result if you have miscarried. There is still enough hormone in your body to produce a positive result.
RED
the color of a positive test results is bright green
all carbohydrates will give a positive visible result
Starch doesnot give positive result for Fehling's test as it does not have a free hemiacetal group
yes starch give positive result for benedict test because it is composed of glucose molecule which is reducing sugar and change color on addition to benedict solution
When there is a positive test for starch using the starch indicator you will observe a color change. The color changes from amber to blue black.
The seed uses the starch until it become an adult plant or in other words, until it is fully grown to produce its own food. Inside the cotyledon, starch is present and thus, gives a positive result for starch :)
Perhaps the iodine solution was old and gave a false negative.
if the test is being performed after extraction/isolation of the starch from the leaves it will give the positive results i.e. presence of the starch can be identified and the starch content is quantifiable. but if the entire leaves are being tested, test will not give the accurate result or no result. Hence, before testing for starch in an entire leaf, the veseline/wax has to be removed.
The maltose positive test will have a degree of how positive, it is. That will tell you how much of the starch has been digested.
Starch digestion (hydrolysis) is incomplete
positive result for when buiret is added to protein is blue or violet/pale lilac colour. (not pink). positive result for when iodine is added to starch is blue or black colour (not pink).
for the presence of starch:)
No, it doesn't.
No, Starch is