cell division


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cell division:

see cellcell,
in biology, the unit of structure and function of which all plants and animals are composed. The cell is the smallest unit in the living organism that is capable of integrating the essential life processes. There are many unicellular organisms, e.g.
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; mitosismitosis
, process of nuclear division in a living cell by which the carriers of hereditary information, or the chromosomes, are exactly replicated and the two copies distributed to identical daughter nuclei.
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; meiosismeiosis
, process of nuclear division in a living cell by which the number of chromosomes is reduced to half the original number. Meiosis occurs only in the process of gametogenesis, i.e., when the gametes, or sex cells (ovum and sperm), are being formed.
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cell division

[′sel di′vizh·ən]
(cell and molecular biology)
The process by which living cells multiply; may be mitotic or amitotic.
References in periodicals archive ?
These complexes are needed to properly unwind chromosomal DNA during cell division so that two new sets of chromosomes - one for each daughter cell - can be formed from the original set.
Our study shows, in general, that a change in the number of stem cell divisions in a tissue type is highly correlated with a change in the incidence of cancer in that same tissue," says Vogelstein.
Most chemotherapy drugs targets and attack cells at a particular phase of the cell division cycle.
As its name suggests, the enzyme we have studied is from a group known as kinase enzymes which use a particular chemical - a phosphate - to catalyse the reactions that lead to cell division.
They found the drug arrested cell division in a variety of human cancer cells grown in mice, including those notoriously resistant to traditional chemotherapy.
Drug-induced arrest of cell division has long been considered only a stop-gap measure, because it was presumed the cells would eventually repair their damage and go on to divide again after treatment," explains Igor Roninson, professor of molecular genetics.
The giant multi-nucleate cells of the green alga, Boergesenia forbesii, undergo segregative cell division upon wounding such that small protoplasts are formed within 2 hours.
The new gel works by temporarily stopping the cell division in the hair follicles, making them "invisible" to the chemotherapy drugs.
It was in this way that the German botanist Eduard Adolf Strasburger (1844-1912) was able to observe some of the changes that took place during cell division among plants.
A: When carcinogens or viruses activate a cell's cancer-producing oncogenes, those genes start making proteins, many of which are enzymes that control cell division.
529-534), reporting on the handicapping conditions associated with the neurological damage referred to above, cite the reduction of cell division in the embryo, the failure of whatever systems have not already matured in the foetus when the rubella strikes, and the continued inflammation (usually from six to eighteen months postnatally but in some rare cases up to 29 years) with its attendant cell damage.
Presence of PSMA at the poles indicated it might have a role in cell division and chromosome segregation, and we continued our quest to understand this potential function of PSMA," said Dr.

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