Correct option (a) The enzymes of the electron transfer chain are embedded in the outer membrane
Explanation:
In mitochondria, the enzymes of electron transport chain are found in the inner membrane while outer membrane contains enzymes involved in mitochondrial lipid synthesis and those enzymes that convert lipid substrates into other forms that are subsequently metabolised in the matrix.
The outer membrane resembles a sieve that is permeable to all molecules of 10,000 daltons mole weight or less, including small proteins.
The inner membrane is impermeable and highly convoluted, forming a series of infoldings, known as cristae, in the matrix space.