You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "where is the matrix located in the mitochondria?" whose answer is within the inner membrane.
Each document should contain about 30 words, and these documents should contain useful information.

Query: location of matrix in mitochondria
Useful Output:

Doc 1: inner membrane is called the matrix in mitochondria and the stroma in chloroplasts. Both spaces are filled with a fluid containing a rich
Doc 2: In this video, we go over the structure and function of the mitochondria.
Doc 3: This membrane surrounds the mitochondrial matrix, where the citric acid cycle produces the electrons that travel from one protein complex to the next in the
Doc 4: In this lesson, understand the function and location of the mitochondrial matrix. See a mitochondria diagram and learn what makes up the mitochondria.
Doc 5: The mitochondria matrix is the innermost part of the mitochondria. It is a gel-like component of the mitochondria.