Phases of Mitosis
The nuclear envelope disappears during which phase?
Prophase
How many main parts of Interphase are there?
3 Main parts
What causes cancer?
When pieces of DNA are damaged.
Prokaryotic cells divide by making a _____ of their DNA and then _____ the cell in half.
Copy, pinching.
True or False
Mitosis is longer than Interphase.
False. Interphase lasts longer than Mitosis, as Mitosis makes up just a small portion of what the cell does.
In Metaphase, chromosomes do what?
Condense and align in the center
S is the second main part of Interphase. What does it stand for?
Synthesis
Tumors that have spread to other parts of the body are known as what?
Malignant
The cell cycle is controlled by ________ and external ________ to allow growth and healing without overpopulating their space or exhausting their available nutrients.
Internal, proteins.
True or False
Cells grow and divide at different rates.
True. Cells do grow and divide at different rates.
Cytokinesis is the final stage of cell division where the cytoplasm divides to form two identical cells called what?
Daughter cells
The first main part of Interphase is G1. What is this part used for?
Growth and protein synthesis
If a tumor has not spread, what type of treatment can be used?
Surgery
The spindle fibers separate the _________ during cell division.
Chromosomes
True or False
External regulatory proteins control the cell cycle by receiving signals on the nucleus.
False. Signals are received on the cell membrane.
During telophase, what forms around the two separated chromosomes?
Nuclear Envelope
Growth and final preparations for Mitosis occur in which main gap?
G2
What treatment targets rapidly dividing cells?
Radiation and chemotherapy.
_____ is the mixture of DNA and proteins that form chromosomes.
Chromatin
True or False
If a cell does not correctly stop at the checkpoints, nothing happens.
False. If a cell does not correctly stop at the checkpoints, it can become cancerous.
During anaphase, sister chromatids separate and move to opposite ends of the cell. What does this ensure?
Each new cell receives a complete set of chromosomes.
What happens during Synthesis in interphase?
DNA replication
Cancer can be caused by exposure to carcinogens. Name one of the Carcinogens that may cause cancer.
Tobacco, radiation, human-made chemicals. (sometimes viruses)
The process Prokaryotic cells used to divide is called _____ _____.
Binary fission
True or False
The cell is controlled by internal and external proteins.
True. The cell is controlled by internal and external proteins.