4A Cell Cycle And Stages Flashcards
What are the main stages of the cell cycle?
G1, S, G2, M
G1 phase is for cell growth, S phase is for DNA replication, G2 phase prepares for mitosis, and M phase is for mitosis and cytokinesis.
What is the role of the cell cycle in organisms?
Regulates growth, development, and tissue renewal
Uncontrolled cell division can lead to cancer.
What occurs during the G1 phase of the cell cycle?
Cell growth and preparation for DNA replication
This includes increase in size, biomass, and sorting of materials.
What happens during the S phase of the cell cycle?
DNA replication
The genetic material is duplicated in preparation for cell division.
What are the stages of M-phase in the cell cycle?
Prophase, Prometaphase, Metaphase, Anaphase, Telophase, Cytokinesis
These stages represent the process of mitosis and the final separation of daughter cells.
What occurs during prophase?
Chromosomes condense and mitotic spindle assembles
This is the first stage of M-phase.
What is the key event during prometaphase?
Breakdown of the nuclear envelope and attachment of chromosomes to the spindle
Chromosomes begin to interact with the mitotic spindle.
Fill in the blank: During metaphase, chromosomes align at the _______.
equator
This alignment is crucial for proper separation during anaphase.
What happens during anaphase?
Sister chromatids separate and are pulled towards spindle poles
This ensures that each daughter cell will receive an identical set of chromosomes.
What occurs during telophase?
Daughter chromosomes arrive at spindle poles and nuclear membrane re-forms
A contractile ring begins to form to initiate cytokinesis.
What is cytokinesis?
The process of separating the cytoplasm to form two daughter cells
This involves the contraction of a ring that creates a cleavage furrow.
True or False: The cell cycle is only important for growth and does not play a role in tissue renewal.
False
The cell cycle is essential for both growth and tissue renewal.
What’s the interphase?
3 stages of, G1, S and G2
What’s mitosis ? And what’s the parts?
Mitosis is the process by which a cell replicates its chromosomes and then segregates them, producing two identical nuclei in preparation for cell division.
Prophase,
Prometaphase
Metaphase
Anaphase
Telophase
Why is cell cycle important
It’s important for regulation of cell division is required for growth, development and tissue renewal.
