instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
One gram of sugar or starch provides 4 calories of energy.
answer:
How many calories of energy does one gram of sugar or starch provide?


question:
Mechanical waves term describes waves that travel through matter.
answer:
What term describes waves that travel through matter?


question:
The bicarbonate neutralizes the acidity of chyme and acts as a buffer.
answer:

What neutralizes the acidity of chyme and acts as a buffer?