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.)