15 Questions
What type of reserve food material is typically found in Strophanthus seeds?
Carbohydrates
Which of the following plant parts is typically stalked at the apex of the seed?
Awn
Which of these seeds is known to contain colchicine, a compound used in medicine?
Colchicum seeds
Which type of seed is often used as a laxative or bulk-forming agent?
Psyllium seeds
Which of these seeds is known for its pungent, spicy flavor and is used as a condiment?
Mustard seeds
What type of cell is described in the passage as having rounded, thickened walls?
Collenchyma cells
Which of the following best describes the sclerenchyma layer mentioned in the passage?
Narrow, longitudinal, elongated cells with pitted, lignified walls
Which plant material is the passage most likely describing?
Colchicum
What is the purpose of the iodine staining mentioned in the passage?
To detect the presence of starch
Which of the following is a characteristic of collenchyma cells?
Thin, unlignified walls
What is the purpose of the test described in the text?
To test for the purity of stramonium
What is the key indicator that the test is negative for the presence of white mustard?
No color change occurs
What is the purpose of the Millon's reagent (mercury nitrate T.S.) in this test?
To react with stramonium alkaloids
What is the duration of the maceration step in the test procedure?
15 minutes
What is the origin of the substance being tested?
The dried ripe seeds of Datura stramonium
Test the purity of a substance by macerating powder with water, filtering, adding Millon's reagent, and observing for the absence of a red color. This test is positive with white mustard. Origin of the substance: The dried ripe seeds of Datura stramonium.
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