When the bacterium Serratia marcescens is grown on a sterile culture medium in a Petra dish at 30C the bacterial colonies are cream colored. When this same bacterium is cultured under identical con?

Answer 1

When Serratia marcescens is grown at 30°C, it typically produces cream-colored colonies due to the absence of certain pigments. However, if the temperature is altered or if the growth conditions change (such as increased temperature or different nutrients), the bacterium may express different pigments, such as red or pink, leading to a change in colony color. This variation is often due to the regulation of genes responsible for pigment production, which can be influenced by environmental factors.