Question

A researcher discovered a small protein secreted by the pituitary that functions as a growth factor to stimulate cell division in mouse skin cells. The skin cells of mice that have a mutation in a particular gene do not respond to this growth factor. When the researcher isolated and sequenced the gene, she found that it coded for a protein kinase. Which statement best explains this

Answer 1

The signal transduction pathway has at least one step in which the signal is transmitted by the activation of a protein via phosphorylation.

Step-by-step explanation: