Serratia marcescens bacteria has a gene that regulates red pigment production by cells.A student inoculates two nutrient agar plates of Serratia and incubates one at 25^oC and the other at 37^oC.Following incubation,the student observes that colonies on the 25^oC plate are red while those on the 37^oC plate are nonpigmented.Which of the following statements is a logical conclusion based on these results?

Question

Quizplus · Accepted Answer

The observation that colonies of Serratia on the 25°C plate are red, while those on the 37°C plate are non-pigmented, suggests that the gene for regulating red pigment production is induced at lower temperatures. Constitutive gene expression refers to the constant expression of a gene, rather than being environmentally regulated. There is no evidence to suggest that low temperatures cause repression of housekeeping genes or that there is a genotypic change that is proportional to temperature changes.

Serratia Marcescens Bacteria Has a Gene That Regulates Red Pigment