17 Questions
Which alkaloid is characterized by the absence of a methyl group, resulting in lower lipid solubility?
Brucine
What is the primary difference in the detection of Strychnine and Brucine using Conc. HNO3?
Strychnine gives a yellow color, while Brucine gives an intense orange-red color
Which alkaloid is a smooth muscle relaxant and vasodilator?
Papaverine
What is the amino acid precursor of Brucine?
Tryptophan
Which of the following is NOT a true alkaloid?
Theophylline
What is the result of adding Conc. HNO3 to a mixture of Strychnine and Brucine?
Strychnine gives a yellow color and Brucine dissolves
Which of the following is a characteristic of Brucine, but not Strychnine?
Presence of (-OCH3) groups
What is the structure of Papaverine?
Benzylisoquinoline
What is the result of adding SnCl2 to a mixture of Brucine and Conc. HNO3?
A violet color is formed
Which of the following alkaloids is obtained from Theobroma cacao?
Theobromine
What is the primary pharmacological activity of Caffeine?
CNS stimulant
Which of the following alkaloids has a vasodilator effect?
Theobromine
What is the result of Mayer's test for alkaloids?
A creamy white precipitate
Which of the following alkaloids is NOT a purine alkaloid?
Papaverine
What is the source of Caffeine?
Coffee arabica
Which of the following alkaloids is used in the treatment of asthma and COPD?
Theophylline
What is the family of the plant that produces Theophylline?
Theaceae
Test your knowledge on alkaloids, including their classification into true, proto, and pseudoalkaloids, with examples of quinine, atropine, and more. Learn about their occurrence, structure, and differences between various alkaloids.
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