Food chemistry (stimulants): Identify the principal active constituent responsible for the stimulant effect of tea and coffee. Think of the purine alkaloid found in both beverages. Choose the correct option.

Q: Food chemistry (stimulants): Identify the principal active constituent responsible for the stimulant effect of tea and coffee. Think of the purine alkaloid found in both beverages. Choose the correct option.

Concept The main psychoactive stimulant common to both tea and coffee is the alkaloid caffeine. Tea also contains theophylline and tannins; cocoa contains theobromine. Final Answer Caffeine

Difficulty: Easy

Caffeine
Theobromine
Nicotine
Tannin

Correct Answer: Caffeine

Explanation:

Concept
The main psychoactive stimulant common to both tea and coffee is the alkaloid caffeine. Tea also contains theophylline and tannins; cocoa contains theobromine.

Final Answer
Caffeine

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