Cell Cycle 1
What are the two main phases of the cell cycle?
Interphase
Mitosis
These are 3 examples of carcinogens.
UV Rays
Tobacco Smoke
Air Polution
During which Prophase what occurs?
Spindle Fibers are released to attach to chromosomes, Nucleus membrane disappears, and mitosis starts
How many phases are there in meiosis?
9
Prophase I and II
Metaphase I and II
Anaphase I and II
Telophase I and II
Cytokinesis
What happens to the original cell when it divides into daughter cells?
It no longer exists.
Which phase of the cell cycle is the period of growth and development?
Interphase
During which phase do the nucleus and cytoplasm divide?
Mitosis/Cytokinesis
How many stages are there in the Interphase phase of the cell cycle?
3
What occurs in G0?
Cells are fully formed and are removed from the cell cycle. The cell can only return to the cycle to repair injuries when needed.
What are the 3 stages of Interphase?
G1, S, G2
What are the 2 stages of of the Mitosis?
Cytokinesis, Mitosis
What happens during the G1 stage in the Interphase?
Rapid growth and replication of organelles
What happens in the S stage of Interphase?
DNA replication
What happens in the G2 phase of Interphase?
Preparation for cell division
What happens during cytokinesis?
Cytoplasm and its contents divide and form 2 identical cells.
What is the difference between mitosis and cytokinesis?
In mitosis, the nucleus and its contents divide.
In cytokinesis, the cytoplasm and its contents divide.
What makes up a chromosome?
2 sister chromatids attached at the center by a centromere.
In metaphase what occurs ?
All cells align in the middle to be separated evenly.
How is the cell cycle important to multicellular organisms?
It allows them to produce more cells for growth, to replace cells, and to repair damage.
How are interphase and the mitosis phase related?
Interphase prepares the cell to reproduce in the mitosis phase.
What happens during the 3 stages of interphase?
There are 5 events
Growth
Preparation for Division
DNA Duplication
Making proteins
Carry out functions
What is produced at the end of the Cell Division?
2 identical daughter cells that are identical to the parent cell
How does a cell at the end of the first phase(interphase) of the cell cycle differ from a cell at the end of the second phase(mitosis)?
At the end of the first phase, a cell has grown, organelles have been replicated, chromosomes have been replicated. At the end of the 2nd, chromosomes and cytoplasm have been divided. Cell has become 2 identical cells.
What are the 4 parts in the mitosis phase of the cell cycle?
metaphase, anaphase, telophase, prophase
What occurs during telophase and cytokinesis?