Question

Which of the following is an alternative to diacetyl for imparting a yellow colour to the beer?

(a) 2,3-Pentanedione

(b) 2,4-Pentanedione

(c) 2,2-Pentanedione

(d) 1,2-Pentanedione

The question was asked in semester exam.

This intriguing question originated from Fermentation Biochemistry topic in division The Biochemistry of Fermentation of Fermentation Technology

Answer 1

Correct choice is (a) 2,3-Pentanedione

The explanation is: 2,3-Pentanedione is used for imparting a yellow colour to the beer and other food products. It is used as an alternative if diacetyl is not available. Both are strong flavouring substances and impart butterscotch flavour to the compounds.