In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Q: Question: What is the smallest unit of time commonly based on? Answer: second

A: Second is the smallest unit of time commonly based on.
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Q: Question: A binary molecular compound is made up of two of what? Answer: elements

A: A binary molecular compound is made up of two  elements.
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Q: Question: Lipids are broken down by what? Answer: lipases

A:
Lipids are broken down by lipases.
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