DNA and Cell Cycle

Front

What is the cell cycle?

Back

The cell cycle is a series of phases that a cell goes through to grow and divide. It includes interphase (G1, S, G2) and mitotic phase (M).

Front

What happens during the G1 phase of the cell cycle?

Back

During G1 phase, the cell grows, synthesizes proteins, and prepares for DNA replication.

Front

What is the S phase in the cell cycle?

Back

The S phase is the part of the cell cycle where DNA is replicated, resulting in two identical sets of chromosomes.

Front

What is the G0 phase?

Back

The G0 phase is a resting state where cells exit the cell cycle and do not actively prepare to divide.

Front

What are oncogenes?

Back

Oncogenes are mutated forms of normal genes that can lead to uncontrolled cell division and tumor formation.

Front

What is the role of cyclins in the cell cycle?

Back

Cyclins are proteins that regulate the progression of the cell cycle by activating cyclin-dependent kinases (CDKs).

Front

What is the consequence of uncontrolled cyclin production?

Back

Uncontrolled cyclin production can lead to unregulated cell division and the formation of tumors.

Front

What is interphase?

Back

Interphase is the longest phase of the cell cycle, where the cell grows, performs its functions, and prepares for division.

Front

What is the difference between benign and malignant tumors?

Back

Benign tumors are non-cancerous and do not spread, while malignant tumors are cancerous and can invade other tissues.

Front

Why do cancer cells not enter the G0 phase?

Back

Cancer cells often bypass the G0 phase, leading to continuous division and tumor growth.