11.3 Regulating the cell cycle

Front

What are cyclin-dependent kinases (CDKs)?

Back

CDKs are enzymes that regulate the cell cycle by phosphorylating target proteins in coordination with cyclins, facilitating cell cycle progression.

Front

How do CDKs contribute to cell cycle regulation?

Back

CDKs promote cell cycle progression by phosphorylating specific target proteins when activated by cyclins.

Front

What is the significance of mutations in cell cycle regulatory genes?

Back

Mutations in cell cycle regulatory genes can disrupt normal control mechanisms of cell division, potentially leading to cancer development.

Front

What are cell cycle checkpoints?

Back

Cell cycle checkpoints are control mechanisms that ensure proper progression through cell cycle stages and prevent errors from being passed on to daughter cells.

Front

Why are cell cycle checkpoints important?

Back

They prevent the propagation of errors in DNA replication and ensure that cells only divide when they are ready.

Front

What are the consequences of uncontrolled cell division?

Back

Uncontrolled cell division can lead to the formation of tumors and the potential development of cancer.

Front

What role does p53 play in cell cycle regulation?

Back

p53 regulates the cell cycle by inducing cell cycle arrest, DNA repair, or apoptosis in response to DNA damage.

Front

How does p53 help prevent cancer?

Back

By preventing the proliferation of cells with damaged DNA, p53 reduces the risk of cancer development.

Front

What happens when p53 is mutated?

Back

Mutations in p53 can lead to a loss of its regulatory functions, allowing damaged cells to proliferate and potentially leading to cancer.

Front

What is the role of cyclins in the cell cycle?

Back

Cyclins are proteins that activate CDKs, which are essential for the progression of the cell cycle.