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

Insulin is made up of two polypeptide chains.
Insulin is made up of how many polypeptide chains?

Slimy smear does the bacteria look when seen with the naked eye.
How does the bacteria look when seen with the naked eye?

The primary motor cortex is located in the frontal lobe of the brain.
The primary motor cortex is located in which lobe of the brain?