regulation act

It controls the operator gene in cooperation with a substance called co repressor present in the cytoplasm. The regulator gene codes for a protein named aporepressor. The latter combines with the co-repressor, and aporepressor-co-repressor complex joins the operator gene, which is turned ..

The growth of plants is regulated by certain chemical substances, which are synthesized by the plant in very small quantities. These substances are formed in one tissue or organ of the plant and are then transported to other sites where they produce specific effects on growth and developm..

Role Of Hormones As Messengers And Regulators - Hormones are informational molecules. They are secreted in response to changes in the environment inside or outside the body. These are released into the extracellular fluid, where they are diffused into the blood stream. The latter carries ..

. Modification of histones makes large blocks of genes available for RNA transcription by loosening the tightly packed inactive chromatin. The specific nonhistone proteins then determine which of the available genes are to be actually transcribed. For this, the nonhistone recognizes a specific DNA ..

The proteins act as buffers in regulating the acid and base concentration in bloo..

The parathyroids secrete a single hormone called parathormone (PTH).Parathormone and calcitonin from the thyroid gland act antagonistically to regulate the calcium phophorous balance in the blood.Parathormone regulates calcium metabolism and controls the amount of cal..

Maintains osmotic pressure and viscosity of the blood Helps in transport of various substances like the hormones, enzymes, etc. Acts as a protein reservoir Helps in clotting of blood Helps in regulating body temperatur..

The activity of some enzymes, particularly those involved in metabolic pathways, are controlled by a self-regulating mechanism. Some specific substance, most often the product itself, acts as an inhibitor. Such an inhibitor binds to an enzyme at a specific site and modifies the..

A stable and self sufficient community has certain specific characteristics. a) Habitat Biotic community occupies particular area with specific physical environment, which acts as a limiting factor, regulating the population size of various species within the community. b) Self ..

Lipids perform several important functions in biosystems. Phospholipids are the constituents of cell mebrane and regulate membrane permeability. Phospholipids are also used as detergents to emulsify fat for transport within the body. They act as cellular metabolic ..