General Biology 1: Cell Cycle Phases

What is the name of your General Biology subject teacher?

The two phases of the cell cycle are ______ and M Phase.

What is the term for the sequence of events that a cell undergoes to duplicate its genome and divide?

What is the typical duration of the cell cycle in human cells?

What are the two basic phases of the cell cycle?

What are the three further phases of interphase?

What occurs during the G1 phase of the cell cycle?

What is the role of DNA replication in cell division?

What might happen if a cell skipped the S phase?

What happens during the S phase of the cell cycle?

What is synthesized during the G2 phase in preparation for mitosis?

What percentage of the cell cycle duration does interphase occupy in human cells?

What is the quiescent stage (G0) of the cell cycle?

What is the importance of cell division in living organisms?

Cell Cycle Overview

The cell cycle consists of two main phases: Interphase and M Phase (Mitosis).
Interphase is divided into three further phases: G1, S, and G2.

Phases of Interphase

G1 Phase:
- Involves cell growth without DNA replication.
- Cells prepare for DNA synthesis.
S Phase:
- DNA synthesis occurs, resulting in DNA doubling.
- Essential for preparing genetic material for cell division.
G2 Phase:
- The cell synthesizes proteins and organelles in preparation for mitosis.

M Phase

M Phase includes mitosis and cytokinesis, where the actual division of the cell occurs.

Duration of the Cell Cycle

The typical duration of the cell cycle in human cells is approximately 24 hours.
Interphase occupies more than 95% of the total cycle duration.

Quiescent Stage (G0)

G0 is an active stage where cells remain metabolically active but do not proliferate, often entered by cells that are not currently dividing.

Importance of Cell Division

Cell division is vital for reproduction, growth, and repair in living organisms.
It plays a crucial role in multicellular organisms by facilitating tissue growth and regeneration.

Consequences of Skipping Cell Cycle Phases

Skipping the S Phase may lead to daughter cells having incomplete genomes.
Proper replication ensures that daughter cells inherit the correct amount of genetic material.

Control Points in the Cell Cycle

The cell cycle is regulated by control points that ensure conditions are favorable for progression to the next phase.
Checkpoints occur at key stages: G1, G2, and during mitosis to prevent errors.

Key Functions of DNA Replication

DNA replication is critical for duplicating the genome prior to mitosis.
It ensures that both daughter cells receive identical copies of the genetic material.

Test your knowledge on the phases of the cell cycle and their control points in this General Biology 1 quiz. Teams will collaborate to answer questions, ensuring a fun and competitive atmosphere. Score high to earn rewards in your next meeting!