The Mitochondrion: Where the Action Takes Place

Question 1

Mitochondria structure:

describe the outer membrane

Answer 1

not a significant permeability barrier for ions and small molecues because it contains porins that permit the passage of solutes

Question 2

Mitochondria structure:

describe the intermembrane structure

Answer 2

between the inner and outer membranes is continuous with the cytosol with respect to small solutes

Question 3

Mitochondria structure:

describe the inner membrane

Answer 3

permeability barrier to most solutes, partitions the mitochondria into two portions (intermembrane space & matrix) also has cristae, which are infoldings that greatly increase the surface area

Question 4

Mitochondria structure:

Describe the matrix

Answer 4

cotains enzymes involved in mitochondrial function as well as DNA molecules and ribosomes

Question 5

What is found in the matrix?

Answer 5

enzymes involved in pyruvate oxidation, the TCA cycle andcatabolism of fatty acids and amino acids

Question 6

What is found in the inner membrane?

Answer 6

electron transport intermediates

F1 complexes: F0F1 complex - ATP synthaze

Question 7

In Bacteria:

where are respiratory funcitons localized?

Answer 7

plasma membrane and cytoplasm

perform the same functions as the inner membrane and the matrix of the mitochondrion