BioScience Dictionary

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Ot.

Found Gene 965 times.

Displaying results 1 to 10.

1. 3'-azido-3'-deoxythymidine (AZT)
An antibiotic used to treat infection by HIV (the AIDS virus ). The drug works by blocking replication of the HIV genetic material (in this case it is composed of RNA rather than DNA ) by preventing the viral RNA from inserting into the host DNA.

2. Abiogenesis
The scientific study of how life originally arose on the planet, presumably from nonliving things and the presence of nonliving organic matter.

3. Abiogenesis
Early theory that held that some organisms originated from nonliving material.

4. Abioseston
Abioseston is a general term for dead organic material floating suspended in ocean water.

5. Abortion
The expulsion or removal of an embryo or fetus from the mother prematurely; this can be done as an artificial procedure, but it often happens naturally when the mother's body expels the embryo/fetus because it has died, has genetic or developmental defects, or because of infection or illness in the mother. Natural abortions are typically called "miscarriages". Medically-induced abortions, which can be completed with surgery or with hormone drugs, are done because the embryo/fetus is unwanted, deformed, not likely to live, or endangers the mother's life or health.

6. Acanthocephala (spiny-headed worms)
A phylum of parasitic organisms, from one of three general classes, generally referred to as spiny-headed worms. They are notable for their lack of a digestive tract.

7. Acetic fermentation
A type of fermentation conducted by certain microbes in which organic materials are broken down into acetic acid to generate ATP for energy.

8. Achalasia
This is a disorder of esophageal peristalsis characterized by degeneration of the ganglion cells of the lower esophagus. This results in the failure of the relaxation of the cardiac sphincter during the passage of food. There is a potential of developing carcinoma of the esophagus in 5 to 10 % of such patients.

9. Achiasmatic
Undergoing meiosis , a process where the cell 's nucleus divides, without reaching the stage at which homologous chromatid s pair to exchange genetic material (called chiasma ta).

10. Activator
In biochemistry: * A DNA -binding protein that regulates one or more gene s by increasing the rate of transcription . * A metabolite that positively modulates an allosteric enzyme .

View web definitions »

Learn more about Gene »