LABORATORY REVIEW
CELL RESPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Enzymes supply the oxygen necessary for the reactions
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Enzymes change reactants from solid to liquids during the reactions.
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The reactions take up too much space in the cell if the enzymes are missing.
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The reactions are too slow to meet the needs of the cell if enzymes are missing.
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Detailed explanation-1: -Answer: D-The reactions are too slow to meet the needs of the cell if enzymes are missing. Most commonly, enzymes accelerate biochemical reactions by lowering the amount of activation energy required.
Detailed explanation-2: -First, they increase the rate of chemical reactions without themselves being consumed or permanently altered by the reaction. Second, they increase reaction rates without altering the chemical equilibrium between reactants and products.
Detailed explanation-3: -Which best explains why enzymes are important in biological systems? They accelerate the rate of chemical reactions.
Detailed explanation-4: -A. Correct – enzymes are substrate-specific due to the shape of their active sites. Changes in pH, temperature causes the proteins that make-up the enzyme to denature. This changes their shape and prevents them from catalyzing reactions.
Detailed explanation-5: -After an enzyme has catalyzed a reaction, it releases its product(s) and can catalyze a new reaction.