Question

What is the source of error or limitation for testing a leaf for starch

Answer 1

Testing a leaf for starch is the simplest photosynthesis lab.  A positive test for starch in a leaf provides evidence that photosynthesis has occurred. The test for starch is a leaf is  an is an extension of the Iodine Test for Starch.

Glucose is the product of photosynthesis, and is rapidly converted to granules of starch  - a polymer of glucose  - for storage.  Starch granules have been visualized in the stroma of the chloroplast as  well as the cytoplasm.

The test for starch in a leaf is also a part of the other photosynthesis experiments. So, take time to understand  the test for starch in a leaf

i hope that it is clear to u...

Answer 2

Answer:

The  mistakes made during the experiment are the source of error for testing a leaf for starch

Explanation:

• Starch is a source of sugar
• Its primary role in plants is to store energy
• Starch can be identified by Iodine test
• Iodine test involves four steps

1. Placing leaf in boiling water
2. Placing soaked leaf in  alcohol
3. Washing leaf in water
4. Stretching out the  leaf
5. Adding iodine to the leaf

• Sources of error during experiment:

1. Not leaving leaves long enough in water, hence the wax coating remains and the leaf is impermeable
2. Not leaving the leaf in long enough in alcohol, which causes the leaf to remain green
3. Leaving the heat source under the water, mainly this is concerning because of the possibility of catching the alcohol on fire.
4. Forgetting to rehydrate the leaf, which makes leaf brittle and hard to stretch out
5. Not stretching out leaf neatly
6. Ripping the leaf, which destroys the integrity of the leaf
7. Not adding enough iodine hence leaf does not get enough amount to react

To learn more about Starch from the given link

https://brainly.in/question/180123

To learn more about Iodine test from the given link

https://brainly.in/question/7801941

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