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

Sucrose is formed when a monomer of glucose and a monomer of fructose are joined in a dehydration reaction to form a glycosidic bond.
What is formed when a monomer of glucose and a monomer of fructose are joined in a dehydration reaction to form a glycosidic bond?

There are three quarks in each proton and neutron.
How many quarks are in each proton and neutron?

The sun is the center of our solar system.
Which of these is the center of our solar system?