BIOLOGY
ENZYMES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Catalysts bring about a decrease in the activation energy
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Catalysts are complex proteins
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Catalysts do not alter the nature and quantity of end products
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Extreme temperature and pH will denature catalysts
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Detailed explanation-1: -Characteristics of a catalyst are as follows : Small quantities of catalyst are sufficient for catalysis. Catalyst activates the rate of reaction but cannot initiate it. Catalytic activity is maximum at optimum temperature.
Detailed explanation-2: -Assertion :A catalyst does not alter the equilibrium constant of a reaction. Reason: The catalyst forms a complex with the reactants and provides an alternate path with lower energy of activation for the reaction; the forward and back ward reactions are affected to the same extent.
Detailed explanation-3: -Catalysts does not initiate a chemical reaction but only increases the rate of the reaction, v. In reversible reactions catalysts equally increases the rate of forward and backward reaction.
Detailed explanation-4: -Catalysts also have a key property called selectivity, by which they can direct a reaction to increase the amount of desired product and reduce the amount of unwanted byproducts. They can produce entirely new materials with entirely new potential uses.