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Where is the most starch found in the plant cell?
Most of the starch contained in a leaf is located within chloroplasts.
What parts of the leaf contained starch before the foil cover was added?
Before the foil cover was added, the parts of the leaf that contained starch were typically the areas exposed to light, primarily the green parts where photosynthesis occurs, such as the upper epidermis and palisade mesophyll. These regions synthesize glucose during photosynthesis, which is then converted into starch and stored. The covered areas, deprived of light, would not produce starch.
Why the other part of leaf do not contain starch?
The other part of the leaf, typically the lower epidermis or underside, does not contain starch because it is not primarily involved in photosynthesis. Starch is produced during photosynthesis in chloroplasts, which are predominantly found in the upper mesophyll layer where light is absorbed. The lower part of the leaf has fewer chloroplasts and is more involved in gas exchange through stomata, rather than in starch storage.
Why is the leaf discolored when testing for starch?
When testing for starch, the leaf is boiled in alcohol to remove the chlorophyll that may mask the iodine-starch color change. If the leaf turns blue-black after applying iodine, it indicates the presence of starch. If the leaf remains discolored, it suggests that starch is absent, as the iodine did not react with any starch molecules present in the leaf.
Why did the leaf turn brittle in testing a leaf for starch?
The leaf turns brittle during the testing the leaf for starch because the ethanol extracts the all water content from the leaf.
Where the most starch found in a plant cell?
Most of the starch contained in a leaf is located within chloroplasts.
Where is the most starch found in the plant cell?
Most of the starch contained in a leaf is located within chloroplasts.
What parts of the leaf contained starch before the foil cover was added?
Before the foil cover was added, the parts of the leaf that contained starch were typically the areas exposed to light, primarily the green parts where photosynthesis occurs, such as the upper epidermis and palisade mesophyll. These regions synthesize glucose during photosynthesis, which is then converted into starch and stored. The covered areas, deprived of light, would not produce starch.
Why the other part of leaf do not contain starch?
The other part of the leaf, typically the lower epidermis or underside, does not contain starch because it is not primarily involved in photosynthesis. Starch is produced during photosynthesis in chloroplasts, which are predominantly found in the upper mesophyll layer where light is absorbed. The lower part of the leaf has fewer chloroplasts and is more involved in gas exchange through stomata, rather than in starch storage.
Where is starch stored in a variegated Coleus leaf?
Starch is typically stored in the amyloplasts, which are specialized organelles within the leaf cells of a variegated Coleus plant. These amyloplasts store starch as an energy reserve that can be used by the plant when needed.
How can you remove the starch from a leaf?
To remove starch from a leaf, you can perform a simple experiment using iodine solution. Boil the leaf in alcohol to remove the chlorophyll, then soak it in hot water to soften it. After that, rinse the leaf with cold water and apply iodine solution — the starch will turn blue-black, indicating its presence.
Why is the leaf discolored when testing for starch?
When testing for starch, the leaf is boiled in alcohol to remove the chlorophyll that may mask the iodine-starch color change. If the leaf turns blue-black after applying iodine, it indicates the presence of starch. If the leaf remains discolored, it suggests that starch is absent, as the iodine did not react with any starch molecules present in the leaf.
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.
Why didn't the margins of the leaf turn blue black after the use of the iodine solution?
The margins of the leaf did not turn blue-black because there was no starch present in that area. The iodine solution reacts with starch to produce a blue-black color. If the margins did not turn blue-black, it suggests that there was no starch in that part of the leaf.
What colour does the leaf turn once iodine is added and is no starch?
When iodine is added to a leaf with no starch, the leaf will remain its original color (usually green). Iodine reacts with starch molecules, turning the leaf blue-black if starch is present.
Why did the leaf turn brittle in testing a leaf for starch?
The leaf turns brittle during the testing the leaf for starch because the ethanol extracts the all water content from the leaf.
What is the answer A leaf was tested for starch the iodine solution stayed orange what does that tell you about the leaf?
If the iodine solution stays orange after testing a leaf for starch, it indicates that the leaf does not contain starch. Starch would typically turn the iodine solution blue-black in color. Therefore, the orange color suggests that the leaf did not produce a significant amount of starch through photosynthesis.
