Question

How many sp2 hybridized carbons are present in tryptophan?

Answer 1

There are nine `sp^2` hybridized carbons in tryptophan.

Explanation:

The formula of tryptophan is

Every carbon atom with a double bond is `sp^2` hybridized.

Every carbon atom in the rings (8 carbons) and the carbonyl carbon has a double bond.

Hence, nine carbon atoms in tryptophan are `sp^2` hybridized.