MCQ
The solvent used for dissolving chlorophyll while testing a leaf for starch is:
- ASodium hydroxide
- BLime water
- CWater
- ✓Ethyl alcohol
✓
Answer
Correct option: D.
Ethyl alcohol
(d) Ethyl alcohol.
Explanation:
Chlorophyll is the pigment responsible for the green colour in plants and is present in the chloroplasts of plant cells. During the process of testing a leaf for starch, it is necessary to remove chlorophyll to obtain accurate results. Chlorophyll can interfere with the detection of starch since both chlorophyll and starch can give a similar green colour.
Ethanol has the ability to dissolve chlorophyll, allowing it to be extracted from the leaf. By removing chlorophyll, the green colour is eliminated, making it easier to observe and detect the presence of starch.
Explanation:
Chlorophyll is the pigment responsible for the green colour in plants and is present in the chloroplasts of plant cells. During the process of testing a leaf for starch, it is necessary to remove chlorophyll to obtain accurate results. Chlorophyll can interfere with the detection of starch since both chlorophyll and starch can give a similar green colour.
Ethanol has the ability to dissolve chlorophyll, allowing it to be extracted from the leaf. By removing chlorophyll, the green colour is eliminated, making it easier to observe and detect the presence of starch.
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