This statement is false because a suspension containing 99% dead calls had their enzyme activity still on.

All of the mentioned points are correct with respect to death time curve method used for sterilized canned food.

Death of bacterial spores is of logarithmic order and hence this lets us compare the heat resistance of species at different temperatures or of different species at the same temperatures.

Mono sodium glutamate (MSG) contains glutamates which are a derivative of glutamic acid and hence this inhibits the development of spore formation which is required by the cell to survive better in adverse conditions.

Coagulation of proteins or a certain mechanism is a reason for the death of cells observed by the following experiment – a suspension containing 99% dead calls had their enzyme activity still on. This experiment shows that enzyme activity has nothing to do with death but inhibition of growth does. Hence, these cells mus have had their enzyme activity nullified only when all the protein/mechanisms in their body were coagulated. Therefore, the statement – Decreasing enzyme content is not a cause but rather a consequence of inhibited growth, holds true.

Lethal mutation is brought about by inhibition of enzyme activity.

Cell protein does NOT coagulate in the absence of air.

It is possible to keep the time constant from previous calculations and maintain a certain temperature to kill bacteria. Bringing the temperature down to a certain value such that the bacteria die in 10 minutes is another method used in old times, called thermal death point. Keeping the temperature constant and keeping them at that temperature till the time they die is the latest method used called the thermal death time method.

All of the mentioned is true about spore formation by cells.

Heat resistance of an organism is designated by the ‘c’ value. It is the number og minutes required to destroy the organism at 121 deg C. The ‘z’ value stands for the number of degrees centigrade required for the thermal death time curve to traverse one logarithmic cycle.