activity pit

It is the step in which the smaller and the larger subunits of ribosome are joined together. This is brought about by mRNA chain. The latter joins the smaller ribosomal subunit with the help of the first codon by a base pairing with an appropriate sequence on rRNA. The combination of the two ..

It is the step in which each of the participating amino acid reacts with ATP to form amino acid AMP complex and pyrophosphate. The reaction is catalyzed by a specific amino acid activating enzyme called aminoacyl-tRNA synthetase in the presence of Mg2+. There is a separate aminoacyl..

Metals such as iron, zinc, lead, copper, etc., are in the middle of the reactivity series. These are moderately reactive metals and are usually present as sulphides or carbonates. A metal is obtained from its ore by the processes of reduction or by electrolysis. In the reduction process, it is the..

It stimulates sperm formation in the male and growth of ovarian follicles in the female. In older persons, it helps to maintain sexual activity..

It is produced by incomplete combustion of carbonaceous fossil fuels such as coal, fuel oil, natural gas, wood, etc., due to insufficient supply of oxygen. Soot is the most common particulate injected into the atmosphere through human activity..

It is secreted by the secretory glands of the stomach wall. It is highly acidic as it contains hydrochloric acid (HCl). It also contains enzymes like pepsin and renin. Both act on proteins. However, renin is present only in young children. It digests the milk proteins. Pepsin is secreted in i..

It is obtained by heating sugar in the absence of air. Sugar charcoal is the purest form of amorphous carbon. Sugar charcoal becomes activated charcoal when it is powdered to particle size of about 5 micron and heated at about 1000 K in vacuum. Activated charcoal has an ..

It is the meristem present at the tip of the root and stem, commonly called as root apex and shoot apex respectively. Such meristems constitute the actively growing regions in the plant body. Due to the activity of apical meristem the plant body keeps increasing in its len..

Gastric Juice - It is secreted by the secretory glands of the stomach wall. It is highly acidic as it contains hydrochloric acid (HCl). It also contains enzymes like pepsin and renin. Both act on proteins. However, renin is present only in young children. It digests the milk proteins. Pepsin i..

It is secreted by the secretory glands of the stomach wall. They are called the gastric glands. The gastric glands are formed by the infoldings of the epithelium and open into the lumen through the gastric pits. There are two types of cells that line the gastric glands - parieta..