BIOCHEMISTRY
PH
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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they are proteins
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they can change shape when temperature or pH changes
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they are used up in chemical reactions
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they speed up the rate of chemical reactions
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Detailed explanation-1: -Answer and Explanation: Of the following regarding enzymes, enzymes being consumed by the reaction they catalyze is incorrect. Enzymes are special in that they’re able to catalyze many different reactions without being consumed or used up by the specific reaction.
Detailed explanation-2: -This statement about enzymes is true: Enzymes accelerate reactions by lowering the activation energy. Enzymes are proteins whose three-dimensional form is key to their function. Enzymes do not alter the overall change in free energy for a reaction.
Detailed explanation-3: -Enzymes speed the reaction, or allow it to occur at lower energy levels and, once the reaction is complete, they are again available. In other words, they are not used up by the reaction and can be re-used. Enzymes are designed to work most effectively at a specific temperature and pH.
Detailed explanation-4: -Answer and Explanation: The correct answer is (b) An active site is normally hydrophilic in nature. The active site of an enzyme is the location, typically a hollow hole or cleft in the enzyme’s surface, where reactants bind and are converted to substrates.
Detailed explanation-5: -Answer is (1) Enzymes are non-specific for a reaction and substrate.