Mitochondrion Structure
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22 Terms
What is the main function of mitochondria?
Site of aerobic cellular respiration
Which cells contain many mitochondria?
Metabolically active cells
Why do muscle cells contain many mitochondria?
They have high energy demands
What is the function of the outer mitochondrial membrane?
Separates the mitochondrion from the rest of the cell
What is the intermembrane space?
The space between the outer and inner mitochondrial membranes
What happens in the intermembrane space during oxidative phosphorylation?
Protons are pumped into it
What is the function of the inner mitochondrial membrane?
Contains proteins involved in oxidative phosphorylation
What are cristae?
Folds of the inner mitochondrial membrane
Why are cristae important?
They increase the surface area for oxidative phosphorylation
What is the mitochondrial matrix?
The space enclosed by the inner membrane
Where does the link reaction occur?
Mitochondrial matrix
Where does the Krebs cycle occur?
Mitochondrial matrix
What is the function of mitochondrial DNA?
Codes for some proteins needed by the mitochondrion
What is the function of mitochondrial ribosomes?
They synthesise proteins within the mitochondrion
How does mitochondrial DNA help mitochondria function?
It allows some required proteins to be produced
How do mitochondrial ribosomes help mitochondria function?
They synthesise proteins rapidly
Why does the matrix contain many enzymes?
It contains enzymes for the link reaction and Krebs cycle
Why are cristae important for the electron transport chain?
They provide more surface area for electron transport proteins
Why are cristae important for ATP synthase?
They provide more surface area for ATP synthase
Why is the intermembrane space small?
It allows a proton concentration gradient to build up quickly
Where is the proton concentration higher during oxidative phosphorylation?
Intermembrane space
What is the main role of mitochondria in ATP production?
Producing large quantities of ATP through oxidative phosphorylation