The inner compartment of mitochondria which is filled with a dense homogenous substance calledMatrixCristaeCisternaeNone of the above

Break Down the Problem

1. Identify the context of the question, which pertains to the structure of mitochondria and specifically the inner compartment.
2. Determine the terminology used to refer to the substance or space within the mitochondria.

Relevant Concepts

The mitochondria have distinct compartments: the outer membrane, inner membrane, intermembrane space, and the matrix. The matrix is the innermost compartment, while cristae refer to the folds of the inner membrane. Cisternae are typically associated with the endoplasmic reticulum.

Analysis and Detail

• The matrix is a viscous fluid that contains enzymes that facilitate the Krebs cycle (citric acid cycle) and is critical for the production of ATP through cellular respiration.
• Cristae are the folds of the inner membrane which increase the surface area available for chemical processes but do not refer to the substance itself.
• Cisternae generally refer to flattened membrane-bound compartments found in the endoplasmic reticulum and Golgi apparatus, not in mitochondria.

Verify and Summarize

Given that the mitochondrion's inner compartment is specifically called the matrix, the answer can be verified by standard biological textbooks and definitions.

Final Answer

The inner compartment of mitochondria which is filled with a dense homogenous substance is called Matrix.