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What are enzymes? What is the importance of enzymes for living beings?
Enzymes are proteins that are catalysts of chemical reactions. From Chemistry it is called that catalysts are non-consumable substances that decrease the activation energy essential for a chemical reaction to happen.
Enzymes are highly specific to the reactions they catalyze. They are of essential importance for life because most chemical reactions of the cells and tissues are catalyzed by enzymes. Without enzymatic action those reactions would not happen or would not happen in the needed speed for the biological processes in which they participate.
Q. What are some functions of the epithelium? The epithelial tissues can perform protection, covering and impermeability against the environment, for instance, in the skin, res
How do embryos of placental mammals excrete nitrogen wastes? Placental animals, as well as embryos, excrete urea. In the adult placental mammal urea is excreted by the urine.
Material Basis of Primitive Life: In the primitive society, human beings invented tools for catching animals, and for collecting, transporting and even preparing food. They l
KINDS OF GROWTH - 1 . AUXETIC GROWTH - Body grows by enlargement of its cells without increase in number of cells. eg. Nematodes, rotifers, tunicates. Growth of b
Q. Why iodine is vital for human beings? Iodine is a essential chemical element for the proper functioning of the thyroid since it is part of the hormones produced by this glan
The structure of moulds When the four pure cultures of mould have reached a vigorous state of growth study each one with a hand lens. See if you can see stalks with tiny black
Biotin (vitamin H) It was revealed that egg yolk could prevent dermatitis and emaciation in rats that were kept on raw egg white a$ the main protein source. The factor of
Tick-Borne Encephalitis (TBE ) TBE occurs in Scandinavia, Western and Central Europe and countries of the former USSR, mainly in rural forested areas. Risk is greatest from Apri
Q. What are some examples of interspecific competition? Instance of interspecific competition are the dispute among worms, vultures, flies and microorganisms for carrion and th
Hardy desert shrubs - having short stem, number of branches and thick leaves. The animals of deserts are primarily arthropods, reptiles, birds and mammals. Large animals are unc
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