Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Processing of filtrate in the proximal tubule helps maintain the ph level in body fluid.

Answer: Processing of filtrate in the proximal tubule helps maintain what level in body fluid?


Question: All metabolic functions carried out by a prokaryote take place in the plasma membrane or cytosol else.

Answer: All metabolic functions carried out by a prokaryote take place in the plasma membrane or where else?


Question: A(n) carnivore is at the top of the energy pyramid.

Answer:
What organism is at the top of the energy pyramid?