General

General

General nature or nature terms.

Industry: Natural environment

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General

oncogenes

Biology; General

Genes that can activate cell division in cells that normally do not divide or do so only slowly. A gene that when over-expressed leads to cancer, but which normally functions in cell division.

one gene, one enzyme hypothesis

Biology; General

Holds that a single gene controls the production, specificity, and activity of each enzyme in a metabolic pathway. Thus, mutation of such a gene changes the ability of the cell to carry out a ...

one gene one polypeptide hypothesis

A revision of the one gene, one enzyme hypothesis. Some proteins are composed of different polypeptide chains encoded by separate genes, so the hypothesis now holds that mutation in a gene encoding a ...

oocyte

Biology; General

A cell that will/is undergo/ing development into a female gamete.

oogenesis

Biology; General

The production of ova. The development of a diploid cell into a haploid ovum or egg cell.

opposable

Biology; General

The capability of being placed against the remaining digits of a hand or foot; e.g., the ability of the thumb to touch the tips of the fingers on that hand.