TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: In their processes of gene expression, archael cells seukaryotic similarties to both bacterial cells and which other type of cell.

SOLUTION: In their processes of gene expression, archael cells show similarties to both bacterial cells and which other type of cell?

PROBLEM: All cells have the small size in common.

SOLUTION: What do all cells have in common?

PROBLEM: Cell mutations is the most common cause of cancer.

SOLUTION:
What is the most common cause of cancer?