Below is a molecule of caffeine. Which of the following features are not present in a molecule of caffeine?
A. a carbonyl group
B. a carboxyl group
C. a methyl group
D. one or more double bonds
Answer:B
Below is a molecule of caffeine. Which of the following features are not present in a molecule of caffeine?
A. a carbonyl group B. a carboxyl group C. a methyl group D. one or more double bonds