instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
The discovery of ribozymes nullified the idea that all biological catalysts are proteins.
answer:
What nullified the idea that all biological catalysts are proteins?

question:
During the early paleozoic, the amount of carbon dioxide in the atmosphere was much greater compared to today.
answer:
During the early paleozoic, the amount of carbon dioxide in the atmosphere compared to today was?

question:
You call cellular respiration that does not need oxygen to proceed anaerobic respiration.
answer:
What do you call cellular respiration that does not need oxygen to proceed?