Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[Q]: Terrestrial biomes are classified by climatic factors and types of primary producers.
[A]: What are classified by climatic factors and types of primary producers?


[Q]: Just as salty taste involves perception of sodium ions in saliva, sweet taste correlates with presence of glucose.
[A]: Just as salty taste involves perception of sodium ions in saliva, what taste correlates with presence of glucose?


[Q]: Glucose molecules molecules in the body holds energy.
[A]:
Which molecules in the body holds energy?