Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Ex Input:
Question: What are the active transport mechanisms by which molecules enter and leave the cell inside vesicles? Answer: endocytosis and exocytosis

Ex Output:
Endocytosis and exocytosis are active transport mechanisms in which large molecules enter and leave the cell inside vesicles.

Ex Input:
Question: When a mountain stream flows onto flatter land and comes to a stop rapidly, what do the deposits form? Answer: alluvial fan

Ex Output:
In arid regions, a mountain stream may flow onto flatter land. The stream comes to a stop rapidly. The deposits form an alluvial fan ( Figure below ).

Ex Input:
Question: Gene expression and what else are usually considered the same molecular process? Answer: protein synthesis

Ex Output:
Gene expression and protein synthesis are usually considered the same molecular process.