1.Which of these is a mobile electron carrier a.Cytochrome bc1 complex b.cyctoch
ID: 271090 • Letter: 1
Question
1.Which of these is a mobile electron carrier
a.Cytochrome bc1 complex
b.cyctochrome oxidase
c.ubiquinone
d.NADH dehydrogenase
2.Protons are pumped in the mitochondria
a.across the matrix ontp the inner membrane space
b.across the inner membrane into the cytosol
c.across the inner membrane into the matrix
d.across the membrane into the matrix
3.The result of proton pumping is
a.pH of inner membrane space being more than the pH of the matrix, and thus establishing an important membrane potential
b.pH of inner membrane space being less than the pH of the matrix, and thus establishing an important membrane potential
c.pH of inner membrane space being less than the pH of the matrix
d.pH of inner membrane space being more than the pH of the matrix
4.Most of the oxygen used by your body is
a.is combined with water to make more water
b.is used during glycolysis
c.is combined with carbon to make CO2
d.used as a final electron acceptor in the electron transport chain
5.The membrane potential established by the inner membrane of the mitochondria is due
a.the pumping of electricity from the cytoplasm into the mitochondria
b.to the fact that membranes are not very permeable to ions
c.to the fact that membranes are very permeable to ions
d.water being moved across the inner membrane
6.The NADH which donate electrons to the electron transport chain is from
a.generation by the mitochondrial
b.metabolic pathways such as the citric acid cycle
c.NADH dehydrogenase
d.the breakdown of FAD+
Explanation / Answer
1.Which of these is a mobile electron carrier
The answer is c.ubiquinone
Ubiquinone accepts the electrons from NADHQ reductase and trasnfers to complex III.
2.Protons are pumped in the mitochondria
The answer is c.across the inner membrane into the matrix
The ATPase complex pumpus the proton from intermembrane space to matrix, during this pumpuing the ATP synthesis occurs.
3.The result of proton pumping is
b.pH of inner membrane space being less than the pH of the matrix, and thus establishing an important membrane potential
When the number of protons increases the pH will be reduced, so, the pH of the innermebrane space being less thant he pH of the matrix.
4.Most of the oxygen used by your body is
d.used as a final electron acceptor in the electron transport chain
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