Dictionary,Defintion,Meaning,What is Rumen, Ruminant, Ribonuclease, RNA, Rod, Ruderal, Runcinate, Enzymes, Thymine

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Your Ad Here	Ribonuclease. An enzyme that catalyse the depolymerization of RNA. RNA. Ribonucleic acid, a molecule consisting of a large number of nucleotides attached together in single file to form a long strand. Each nucleotide contains the sugar ribose and one of the four different bases present in DNA, except that uracil replaces thymine. In most organisms RNA occurs mainly as ribosomes to a lesser extent as Transfer RNA and less still as Messenger RNA, and these forms being concerned in translating the structure of DNA into structure of protein molecules. In eukaryote cells there are also many kind of protein molecules. In eukaryote cells there are also various kinds of nuclear RNA. In few viruses RNA is the inherited material, but undergoes translation into DNA before replication in the host cell.
Rod. A type of light-sensitive nerve cell present in vertebrate retina. The rod-shaped outer segment of the cell, which is the light-sensitive part, consists largely of a stack of flat and parallel unit membranes, at right angles to the cell length; this develops embryologically from a cilium, and retains its characteristic 9+2 pattern of fibrils (see Flagellum). Rods do not discriminate fine detail or probably colour differences, but are sensitive to very dim light, while the cones are not. Root. That part of vascular plant that usually grows downwards into the soil, anchoring plant and absorbing water and nutrient salts. Roots cannot be distinguished from stems on basis of their position with respect to soil since roots of some plants may be wholly or partly above ground, while other plants possess underground stems.
Rotate. Having petals at right angles to the axis forming a wheel shape. Ruderal. A plan living on maste land in built up areas. Rumen. Storage compartment of complicated stomach (rumen is really a diverticulum of oesophagus) of ruminants, into which newly eaten, but unchewed, food is passed and from Which it (the ‘cud’) is subsequently returned to mouth for chewing. Some digestion of food (especially cellulose), and much synthesis of B vitamins which are absorbed by the animal, occurs by bacterial action in rumen; some products of cellulose digestion are absorbed by rumen. Ruminant. Mammal belonging to the sub-order Pecora of the order Artiodactyla. Deer, giraffes, sheep, goats, antelopes, oxen. No upper incisor teeth. Often with bone-cored horns, Stomach usually complicated. See Rumen. Runcinate. Having pinnate lobes pointing backwards to the leaf base. Runner. A stem that grows horizontally along the soil surface and gives rise to new plants either from auxillary or terminal buds. Runners are seen in the creeping buttercup and the strawberry. Offsets, e.g. those of the houseleek, are short runners. Rut. The period of maximum testicular activity in male mammals particularly applied to the period of sexual activity in deer.	Your Ad Here

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