• Biochemistry,  Cell biology

    ENZYMES

    The global life depends on a series of chemical reactions. Most of the chemical reactions proceed too slowly on their own to sustain life. Hence catalysts are required to greatly accelerate the rates of these chemical reactions. In nature enzymes posses the catalytic power to facilitate life processes in essentially all life-forms from viruses to man. Most of the enzymes retain their catalytic potential even after extraction from the living organism. The above catalytic power of enzyme leads to commercial usage of enzymes. In ancient days enzymes are used in manufacture of cheeses, breads, and alcoholic beverages, and for the tenderizing of meats. Today enzymes are also of fundamental interest…

  • Zoology

    EAR ANATOMY

    The ear is the organ found in animals which are designed to perceive sounds. Most animals have some sort of ear to perceive sounds, which are actually high-frequency vibrations caused by the movement of objects in the environment. The human ear picks up and interprets high-frequency vibrations of air, while the sound-sensing organs of aquatic animals are designed to pick up high-frequency vibrations in water. Most vertebrates have two ears: one on either side of the head. In some animals, including most mammals, the ear is also used for balance. In humans, the inner ear contains parts called the semicircular canals, where otoliths – tiny stone-like structures – shift in…

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