Question

The RAS system was identified in ____________

(a) Animal cells

(b) Plant cells

(c) Bacterial cells

(d) Mammalian cells

This question was posed to me in an international level competition.

I would like to ask this question from Fermentation Biochemistry topic in section The Biochemistry of Fermentation of Fermentation Technology

Answer 1

Right answer is (d) Mammalian cells

To explain I would say: The RAS system was identified in mammalian tumour cells where they are involved in the regulation of cellular proliferation and homologous systems have also been found in yeast cells. It was discovered by Tamanoi in 1988.