10 Questions
Which of the following is true about the outer mitochondrial membrane?
It contains integral membrane proteins called porins
What is the main function of the porins in the outer mitochondrial membrane?
To allow molecules of any size to freely diffuse
How do larger proteins enter the mitochondrion?
They are transported by specialized translocate complexes
What is the protein-to-phospholipid ratio of the outer mitochondrial membrane?
The same as that of the eukaryotic plasma membrane
Which of the following is NOT an activity of the enzymes in the outer mitochondrial membrane?
Import of mitochondrial pro-proteins
Which G protein subunit stimulates adenylyl cyclase?
a subunit
How many different β subunits do mammalian genomes encode?
5
What is the function of γ subunits in G proteins?
Regulate the activities of other target enzymes
Which G protein is associated with the epinephrine receptor?
G5
How do different G proteins couple receptors to distinct intracellular targets?
By associating with different receptors
Test your knowledge on the structure and function of the outer mitochondrial membrane, including its thickness, protein-to-phospholipid ratio, and the role of porins in molecule diffusion.
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