ph dependence of enzymes

A large number of chemical reactions will be taking place in a cell. The rate and efficiency with which these reactions go on in a cell, depend on a group of macromolecules called enzymes. Enzymes are thus, biological catalysts. Enzymes are synthesised by li..

Enzymes are generally classified on the basis of the type of reactions that they catalyse. 6 groups of enzymes can be recognised on this basis. The following table lists the 6 groups of enzymes along with example. fig. 14.15 - Classification of Enzymes..

>o C. Enzyme activity decreases below and above this range of temperature. Each enzyme requires a specific pH for its activity. Enzyme activity decrease below and above this optimum pH. Enzymes generally work in groups in a cell. The product one ..

) Enzymes bind the substrate by multiple weak interactions. These weak interactions are electrostatic bonds, hydrogen bonds, van der Waals' forces and hydrophobic interactions. van der Waals' forces become significant in binding only when many substrate species can come simultaneously clo..

Enzymes resemble inorganic catalysts in several aspects and differ from them in many other features. These similarities and differences are summarised in the following table. fig. 14.12 - Similarities and Differences between Enzymes and Cataly..

The resistivity of a metallic conductor nearly always increases with increasing temperature. As temperature increases, the ions of the conductor vibrate with greater amplitude, making it more likely that a moving electron will collide with an ion. This impedes the drift of electrons and hence the c..

When one measures the standard electrode potentials, the temperature of the cell is 298 K and the concentration of the electrolyte solutions is fixed as 1 M. However, in actual practice, the electrochemical cells are not always at 298 K nor do always have this concentration of the electrolyte solut..

It has been observed that a high concentration of oxygen, inhibits photosynthesis. This is due to the reason that the CO 2 fixing enzyme RUBP carboxylase not only accepts CO 2 but can also combine with O 2 . Since the reaction is an oxygenation reaction, the same enzyme is calle..

. Secondary carnivores are preyed upon by some larger carnivores. Tertiary carnivores or Quaternary consumers include the animals, which feed on the secondary carnivores. For e.g., lion, tiger, etc. These are not eaten by any other animals. The larger carnivores, which cannot be preyed upon further..

The metabolic pathway through which the electron passes from one carrier to another, is called the electron transport system. Electron Transport System (ETS) in Mitochondrion The electron transport system occurs in the inner membrane of the mitochondria. The electron transport system contains mainl..