active transportation

The transport of materials across the cell membranes with the help of energy is called active transport. Both diffusion and osmosis are passive transport mechanisms, not requiring energy. Active transport helps in the transport o..

It is a process by which certain substances like glucose molecules are transported against the concentration gradient. The carrier proteins in the cell membrane carry out the process. The substance present in the medium binds with the active site on the carrier protein form..

Transport facility created for the convenience of human beings is a great source of air pollution as all the transport vehicles burn some kind of fuels and emit dangerous gases. The extent of gases produced by an individual vehicle may be less. But, when large number of vehicles..

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