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Q1 - False. They are denatured not killed.

Q2 - True.

Q3 - False. They are inactive at low temperatures, but they may not denature.

Q4 - False. The rate of reaction decreases with time as substrate molecules are being used up, not enzymes.

Q5 - False. Some enzymes function by induced-fit.

Q6 - True.

Q7 - True.

Q8 - False. Enzymes remain chemically unchanged.

Q9 - False. Not all follow this nomenclature. The enzyme in the stomach that digests proteins is called Pepsin.

Q10 - True. (Take note, it is true they can still occur, but they will be so slow that the reactions cannot sustain life.)

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Biological reactions can still happen in cells without any enzymes.

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All enzymes are named in this way: “the substrate which it acts on” followed by the suffix “-ase”. For example, enzyme maltase is an enzyme which acts on its substrate, maltose.

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Enzymes speed up chemical reactions while remaining emotionally unchanged.

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Enzymes can break up large food molecules to smaller ones, or use smaller food molecules to synthesise larger ones.

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Denaturation is the change in the three-dimensional structure of an enzyme, caused by heat or chemicals.

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The ‘lock-and-key’ hypothesis of enzyme action applies to all enzymes.

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The rate of an enzymatic reaction decreases with time as enzyme molecules are used up during the reaction.

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Enzymes are denatured at very low temperatures.

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The optimum temperature for enzyme activity in cells is 37 °C - body temperature.