Biology · CELL THE UNIT OF LIFE

Which structural and chemical feature correctly distinguishes the inner mitochondrial membrane and matrix from the outer mitochondrial membrane?

1. The outer membrane forms deep tubular infoldings called cristae, whereas the inner membrane forms a smooth continuous limiting boundary.
2. The matrix lacks any genetic material and depends exclusively on nuclear 80S ribosomes for protein synthesis.
3. The inner membrane forms infoldings called cristae towards the matrix to increase surface area, and the matrix possesses a single circular DNA molecule, 70S ribosomes, and RNA.
4. The inner membrane contains only lipid pigments while the outer membrane possesses enzymes specifically meant for the Krebs cycle.