The diagram shows a continuous bioreactor used to cultivate the fungus Fusarium venenatum for the commercial production of mycoprotein.

Explain the importance of the water-filled cooling jacket in maintaining maximum mycoprotein yield.
Prior to introducing the fungal culture and nutrients, the entire system is treated with high-pressure steam. Explain why this step is necessary.
Explain the consequences on the fungal growth rate if a mechanical fault causes the stirring paddles to cease rotating.