Which of the following descriptions is consistent with the behavior of a cell that lacks a protein required for a checkpoint mechanism that operates in G2? The cell would be unable to enter M phase. The cell would be unable to enter G2. The cell would pass through M phase more slowly than normal cells. Nothing would change. The cell would enter M phase under conditions when normal cells would not.

The cell would enter M phase under conditions when normal cells would not.

Explanation:

The G2 checkpoint provides an opportunity for repair and stopping the proliferation of damaged cells as it prevents cells from entering mitosis when DNA is damaged. The G2 checkpoint ensures all of the chromosomes have been replicated. Also, it ensures that the replicated DNA is not damaged before the cell enters mitosis. The cell would enter M phase under conditions when normal cells would not.

It is also an important focus in understanding the molecular causes of cancer.

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.