Question

1. why are cancer cells considered \unregulated\? a they divide slowly b they skip checkpoints c they complete mitosis early d they do not grow

Explanation:

Cancer cells are considered unregulated because they skip checkpoints in the cell cycle. In a normal cell cycle, there are checkpoints (such as G1/S, G2/M checkpoints) that ensure the cell has met all the requirements (like proper DNA replication, no DNA damage) before proceeding to the next stage. Cancer cells often have mutations that allow them to bypass these checkpoints. This leads to uncontrolled cell division.

• Option A is incorrect because cancer cells divide rapidly, not slowly.
• Option C is incorrect. Cancer cells do not complete mitosis early; rather, their cell - cycle regulation is disrupted.
• Option D is incorrect as cancer cells do grow and divide.

Answer:

B. They skip checkpoints