Why do neurons and some other specialized cells divide infrequently?
A) They no longer have active nuclei.
B) They no longer carry receptors for signal molecules.
C) They have been shunted into G₀.
D) They can no longer bind Cdk to cyclin.
E) They show a drop in MPF concentration.

Question

Quizplus · Accepted Answer

Cells that are shunted into the G₀ phase of the cell cycle are in a quiescent state where they do not actively divide. This includes neurons and some other specialized cells.

Answer: A, B, D, E are all incorrect
 None of the other choices accurately explain why neurons and specialized cells divide infrequently. They still have active nuclei, carry receptors, and can bind Cdk to cyclin. The drop in MPF concentration is a normal part of mitosis and not related to the infrequency of cell division in specialized cells.

Why Do Neurons and Some Other Specialized Cells Divide Infrequently