Mitochondrion structure

Question 1

Outer membrane:

Answer 1

• Separates contents of the mitochondrion from the rest of the cell

Question 2

Intermembrane space:

Answer 2

• Space between outer and inner membranes into which protons are pumped during oxidative phosphorylation

Question 3

Inner membrane:

Answer 3

Contains proteins involved in oxidative phosphorylation

Question 4

Cristae:

Answer 4

Folds in inner membrane of mitochondria

Question 5

Matrix:

Answer 5

• Space within inner membrane that is site of link reaction and Krebs cycle

Question 6

Mitochondrial DNA

Answer 6

• Codes for some of the proteins required for mitochondrion to function

Question 7

Mitochondrial ribosismes:

Answer 7

• Used for protein synthesis within mitochondria

Question 8

Adaptions of mitochondria:

Answer 8

• Matrix contains all enzymes needed for link reaction and Krebs cycle
• Mitochondrial DNA and ribosomes produce enzyme proteins rapidly
• Cristae significantly increase inner membrane’s surface area, so it can contain more proteins like those in the electron transport chain and enzymes like ATP synthase
• Intermembrane space is small, so the proton concentration gradient between the intermembrane space and mitochondrial matrix builds up quickly