Question

The 2-component system drives bacterial chemotaxis by coupling autophosphoryaltion of which receptor to phosphorylation of respective regulatory protein?

(a) His kinase

(b) Adenylyl cyclase

(c) Guanylyl cyclase

(d) None

This question was posed to me in an internship interview.

My doubt is from Signaling in Microorganisms and Plants topic in portion Biosignalling of Biochemistry

Answer 1

Right answer is (a) His kinase

For explanation I would say: The 2-component system drives bacterial chemotaxis by coupling auto-phosphorylation of his kinase to phosphorylation of the respective regulatory protein.