At Several Points in the Cell Cycle There Are Checkpoints

question 69

Essay

At several points in the cell cycle there are checkpoints that control the cell's passage from one phase to the next. If a cell receives a signal at each checkpoint, it continues to the next phase; if it does not receive the signal, the cell does not continue. For example, a growth factor may stimulate a cell to move from G₁ into S phase. If no growth factor is present, the cell cycle stops in G₁ and the cell does not divide. Predict what would happen to a cell and to a multicellular organism if there was a defect at the checkpoint and the cell continued through the cell cycle even in the absence of a signal.

---

Definitions:

Forecasting Risk

The potential for a forecast to be inaccurate, which can lead to incorrect business decisions and financial performance assessments.

Sensitivity Analysis

A financial model technique used to determine how different values of an independent variable impact a particular dependent variable under a given set of assumptions.

Base Case

The default scenario in project assessments or financial modeling, representing expected conditions without any changes or shocks.

Worst Case

The most adverse or unfavorable scenario that can happen in a situation.