A cell has been subjected to X-ray irradiation, causing a significant number of mutations in the genome. Which of the following would you NOT expect to occur as a result?

(A) Activation of the protein kinase ATR
(B) Activation of the protein kinase Chk1
(C) Inactivation of the protein phosphatase Cdc25
(D) Binding of p53 to Mdm2
(E) Stabilization of p53

(D) Binding of p53 to Mdm2

Explanation:

Radiation can be very dangerous, as it has the ability to promote mutations in cells that can trigger physical anomalies that will bring great discomfort to the body. X-ray irradiation is not an exception and is capable of causing a significant number of mutations in the genome.

In relation to the question above, radiation X does not promote the binding of p53 to Mdm2, on the contrary, radiation causes the dissociation of these two systems. In addition, it causes the protein kinase ATR and Chk kinase to be deactivated, the protein phosphatase inactivation Cdc25 and p53 to stabilize.

golgi body just took the test on edge

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?