What Do Barn Owls Eat | Barn Owl Facts For Kids. Whether they are living in natural environment or artificial roosting places (such as ruined buildings) barn owls will hunt terrestrial mammals including rodents. Barn owls are known to fly just above the open ground hovering over spots that cover potential prey.
Regulation of gene expression includes a wide range of mechanisms that are used by cells to increase or decrease the production of specific gene products (protein or RNA), and is informally termed gene regulation. Repressors bind to the Operator, coding sequences on the DNA strand that are close to or overlapping the promoter region, impeding RNA polymerase's progress along the strand, thus impeding the expression of the gene.The image to the right demonstrates regulation by a repressor in the lac operon.
The answer would be Cyclins are proteins that regulate when and how often a cell divides. Cyclins belong to a family of proteins that control the progression of a cell through its respective cell cycle. This is initiated by activating cyclin-dependent kinase (CDK) enzymes which regulate transcription of RNA and process mRNA during mitosis.