The process by which a cell divides into two new daughter cells.
What is a cell division?
100
A part of eukaryotic cell division during which the cell nucleus divides.
What is Mitosis?
100
One of a family of closely related proteins that regulate the cell cycle in eukaryotic cells.
What is Cyclin?
100
A disorder in which some of the body's own cells lose the ability to control growth.
What is cancer?
100
Fourth and final phase of mitosis, during which the chromosomes begin to disperse into a tangle of dense material.
what is telophase?
200
The larger a cell becomes, the more demands the cell places on its DNA. In addition, the cell has more trouble moving enough nutrients and wastes across the cell membrane.
why do cells divide? instead of growing indefinitely?
200
Division of the cytoplasm during cell division.
what is cytokinesis?
200
By placing some cells in a petri dish containing nutrient broth. the nutrient broth provides food for the cells.
How can scientists observe the effects of controlled cell growth?
200
The principal reason may be that the consequences of uncontrolled cell growth in a multicellular organism are very severe and can lead up to cancer.
Why is cell growth regulated so carefully?
200
The third phase of mitosis, during which the chromosome pairs separate and move toward opposite poles.
what is anaphase?
300
When a cell is small, the information stored in that DNA is able to meet all of the cell's needs. But as a cell increases in size, it usually does not make extra copies of DNA. If a cell were to grow without limit, an "information crisis" would occur.
what is DNA overload?
300
Chromosomes are made up of DNA , which carries the cell's coded genetic information and proteins.
What are chromosomes?
300
Proteins that respond to events inside the cell are called internal regulators.
What are internal regulators?
300
The various forms of cancer have many causes such as smoking tobacco, radiation exposure, and even viral infection.
What causes the loss of growth control the characterizes cancer?
300
Second phase of mitosis, during which the chromosomes line up across the center of the cell.
What is Metaphase?
400
Living things grow by producing cells. Even if there's a adult snail and a baby cell they still have the same amount of cells.
How do living things grow?
400
During the cell cycle, a cell grows and prepares for division, and divides to form two daughter cells, each of which then begins the cycle again.
What happens during a cell cycle?
400
They allow the cell cycle to proceed only when certain processes have happened inside the cell.
what do internal regulators allow?
400
The control over the cell cycle has broken down. come cancer cells will no longer respond to external growth regulators, while others fail to produce the internal regulators that ensure orderly growth.
What do all cancers have in common?
400
A fanlike microtubule structure that helps separate the chromosomes during mitosis.
What is a spindle?
500
It would be more difficult to get sufficient amounts of oxygen and nutrients in and waste products out.
what happens when a cell gets to large?
500
prophase, metaphase,anaphase, and telophase
What are the 4 phases of the events of mitosis?
500
Proteins that respond to events outside the cell are called external regulators.
What are external regulators?
500
It halts the cell cycle until all chromosomes have been properly replicated. Damaged or defective p53 causes the cells to lose the information needed to respond to signals that would normally control their growth.
what do p53 genes do?
500
One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope.