19 results found

Search Results for: operon

Gene Action – Operon Hypothesis

Reviewed by: Mary Anne Clark, Ph.D. Some genes are switched on or off depending on environmental conditions. The... Read More

Operon

Definition noun, plural: operons A group of genes or a segment of DNA that functions as a single transcription unit. It is... Read More

His operon

His operon (Science: molecular biology) An operon which governs the synthesis of the amino acid histidine out of atp and... Read More

Operon Model

Definition noun A model conceptualized by François Jacob and Jacques Monod depicting the coordinate expression of a group... Read More

Lac operon

Lac operon --> lactose operon group of adjacent and coordinately controlled genes concerned with the metabolism of... Read More

Repressor protein

Definition noun, plural: repressor proteins A protein in which its binding to the operator inhibits the transcription of one... Read More

Structural gene

Definition noun, plural: Structural genes Any of the genes coding for the production of a specific RNA, structural... Read More

Regulatory gene

Definition noun, plural: regulatory genes A gene that is involved in the production of a substance that controls or... Read More

Operator

Definition noun, plural: operators (1) (genetics) A segment of DNA where the repressor binds to, thereby preventing the... Read More

Lactose

Definition noun plural: lactoses lac·tose, ˈlæk.toʊs A disaccharide (chemical formula: C12H22O11) made up of one... Read More

Constitutive mutant

Definition noun A mutant organism that continuously produces a protein (and therefore may be produced in excess) due to a... Read More

Nif gene

Definition noun, plural: nif genes The complex of genes encoding enzymes involved in the fixation of atmospheric... Read More

Promoter

Definition noun, plural: promoters (chemistry) A substance that is capable of increasing the activity of a catalyst to... Read More

Cyclic adenosine monophosphate

Definition noun plural: cyclic adenosine monophosphates (biochemistry) A cyclic form of adenosine monophosphate that... Read More

Galactose

Definition noun plural: galactoses ga·lac·tose, ɡəˈlæktəʊz An aldohexose monosaccharide (chemical formula:... Read More

Promoter gene

Definition noun, plural: promoter genes (genetics) A site in a DNA molecule at which RNA polymerase and transcription... Read More

Glycosidase

Definition noun, plural: glycosidases (biochemistry) An enzyme catalyzing the hydrolysis of a... Read More

Ribosomal DNA

Definition noun DNA sequence that codes for ribosomal RNA Supplement Ribosomal DNA is the sequence of DNA that codes for... Read More

Inducer

An agent capable of activating specific genes.A molecule that inhibits the action of the repressor of an operon, preventing... Read More