If a cell lost its ability to perform cellular respiration then after some time the cell will eventually die.
Explanation; Cellular respiration is the process which takes in nutrients and uses them to create energy in the form of ATP, which is used by the cells to perform their activities. Therefore; the main purpose of cellular respiration is the provision of energy to the cells which they need to function. Therefore; if a cell lost its ability to undertake cellular respiration, it means that energy wont be generated , and thus, cellular activities will not take place and hence the cell will die.
Option E, involved in bioleaching AND produced by unicellular sulfur-oxidizers.
Sulfur-oxidizing bacteria (both unicellular & colorless) are responsible for oxidizing the inorganic compounds thereby producing sulfuric acid. when bacteria and fungi are used for extracting pure inorganic substance from its raw ore, then this process is called bio leaching. The net product of any such process in most of the cases is the pure metal in form of sulfate and sulfuric acid.