Question

Which of the following statements regarding
mitochondrial membrane is not correct ?
(a) The inner membrane is highly convoluted
forming a series of infoldings
(b) The outer membrane resembles a sieve
(c) The outer membrane is permeable to all kinds
of molecules
(d) The enzymes of the electron transfer chain
are embedded in the outer membrane

Answer 1

Answer:

c

Explanation:

the outer membrane is permeable to all kinds of molecules

Answer 2

(d) The enzymes of the electron transfer chain  are embedded in the outer membrane

Explanation:

The outer membrane of the mitochondrion is smooth, freely permeable to most small molecules, contains fewer enzymes and is poor in proteins. It has porin proteins which form channels for the passage of molecules through it. It allows the uptake of substrates and release of ATP. The inner membrane is semipermeable and regulates the passage of materials into and out of the mitochondrion. It is rich in enzymes and carrier proteins (permeases). It is usually produced into numerous infolds called cristae (singular crista). It bears minute regularly spaced tennis racket like particles known as oxysomes. The rest of the inner membrane contains the electron carrier molecules of the electron transport chain.