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

Q: Simple kind of diffusion do small hydrophobic molecules squeeze through lipid molecules.

A: What kind of diffusion do small hydrophobic molecules squeeze through lipid molecules?
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Q: Insulin is made up of two polypeptide chains.

A: Insulin is made up of how many polypeptide chains?
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Q: Rna analysis type of analysis is performed to study gene expression patterns in cells.

A:
What type of analysis is performed to study gene expression patterns in cells?
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