Tag: biomacromolecules

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Multiple choice biomacromolecules biotechnology cell biology and biotechnology biomolecules biology

Purine  base with methyl substituents occurring in plants are

  1. Caffeine

  2. Theophylline

  3. Theobromine

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A number of purine bases containing methyl substituents occur in plants and plant products and many of them have pharmacological properties. For example Theophylline is chemically 1,3-dimethylxanthine. It is found in tea. Theobromine occurs in cocoa. It is chemically 3,7-dimethylxanthine. Caffeine is present in coffee. It is chemically 1,3,7-trimethylxanthine.