In Bacteria, sensor kinases that respond to extracellular signals transfer this signal to the cytoplasmic machinery by typically phosphorylating the residues.
A) histidine
B) serine
C) threonine
D) tyrosine

Question

Quizplus · Accepted Answer

Sensor kinases in bacteria typically phosphorylate histidine residues in order to transfer extracellular signals to the cytoplasmic machinery. Phosphorylation of histidine residues can lead to a conformational change in the sensor kinase, allowing it to interact with downstream signaling molecules and initiate a response within the cell. While serine, threonine, and tyrosine residues can also be phosphorylated in other cellular processes, they are not typically involved in bacterial signal transduction.

In Bacteria, Sensor Kinases That Respond to Extracellular Signals Transfer