AP BIOLOGY

CELL DIVISION

THE CELL CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
At the end of the G1 phase, there’s a checkpoint. What is this checkpoint probably checking for?
A
To see if the cell has grown enough
B
To see if the DNA was correctly replicated
C
To make sure the cell does not have cancer
D
To make sure that the enzymes aren’t amalyzed
Explanation: 

Detailed explanation-1: -At the G1 checkpoint, cells decide whether or not to proceed with division based on factors such as: Cell size. Nutrients.

Detailed explanation-2: -The primary G1/S cell cycle checkpoint controls the commitment of eukaryotic cells to transition through the G1 phase to enter into the DNA synthesis S phase.

Detailed explanation-3: -Once the cell passes the G1 checkpoint, the cell becomes committed to the cell cycle and enters the S phase where DNA is replicated. The checkpoint is to ensure the cell has grown enough and has enough resources to begin DNA replication.

Detailed explanation-4: -G1 (restriction) checkpoint. The G1 checkpoint, also known as the restriction point in mammalian cells and the start point in yeast, is the point at which the cell becomes committed to entering the cell cycle.

There is 1 question to complete.