study membrane proteins scientists

>Plastids are spherical or oval cell organelles found only in plant cells. Plastids are of two types: leukoplasts without any colouring pigments and chromoplasts containing colouring pigments. The most familiar chromoplasts are the chloroplasts containing chlorophyll. Lysosomes are organelles bound..

Acids, bases and salts are three main categories of chemical compounds. These have certain definite properties that distinguish one class from the other. Scientists like Lavoisier and Davy studied acids and bases in a scientific manner. Initially, Lavoisier believed oxygen..

This process is much faster and requires energy. A membrane pump operates across the cell membranes which transports the nutrients from the lumen of the intestine into the cells. This transport occurs with the help of ATP molecules. The carrier proteins in the me..

The different kinds of micromolecules and macromolecules that we have studied so far occur in the cell dissolved in solution or as suspensions in a colloidal state. Alternatively, they may be assembled into subcellular components like cell membrane, cytoplasm and cell orga..

The eukaryotic cells show a varied number of chromosomes. It is presumed to be the result of breaking up of a single long chromosome into several short units, in the course of evolution, to accommodate the increase in the amount of genetic information. The eukaryotic chromosomes occur inside the nu..

Eukaryotic Chromosome - The eukaryotic cells show a varied number of chromosomes. It is presumed to be the result of breaking up of a single long chromosome into several short units, in the course of evolution, to accommodate the increase in the amount of genetic information. The eukaryotic chromos..

>The individual fungal cells are bound by definite cell wall made up of chitin or cellulose or both. Chitin also called as fungal cellulose, is normally found in association with other compounds like proteins and lipids. The cell wall encloses protoplasts which are differentiated into pla..

As a result of -subunit activity, a transducer G protein activates enzyme phosphodiesterase. This enzyme makes phosphatidylinositol 4,5-biphosphate (PIP 2 ) into a pair of mediators inositoltriphosphate (IP 3 ) and diacylglycerol (DG). In turn, IP 3 , which is water-soluble, and so diffu..

According to this theory, accumulated damage caused by oxygen radicals causes cells to stop functioning and eventually organs also stop functioning. An oxygen free radical is a by-product of normal metabolism produced when cells turn food and oxygen into energy. This free radical, in need of a mate..

1. Calcium is a component of calcium pectate, which is found in the middle lamella. 2. Acts as an activator of enzymes like ATP-ase, some kinases, phospholipases, a -amylase and succinate dehydrogenase. 3. Takes part in lipid metabolism. 4. Required in the maintenance of cell membrane. 5...