Question 3 1 pts in response to energy demands like heavy...

Question 3 1 pts In response to energy demands like heavy exercise, the OXPHOS system responses by... Increased flow of protons back into the mitochondrial matrix via UCPs Decrease in proton motive force Increase in electron flux and O2 consumption B and D All of the above

Activation of mitochondrial electron transport activity results in: a. pumping of protons from the matrix into the intermembrane space. b. acidification of the mitochondrial matrix. c. increased pH in the intermembrane space. d. pumping of protons from the intermembrane space into the matrix. 2. Electrons move in the direction of coenzyme Q to Q2 because: a. the delta G of successive reactions is increasingly larger. b. the reduction potential of Coenzyme Q is higher than that of the following electron acceptors. c. oxygen has the highest reduction potential. d. most of the redox reactions are endothermic and thermodynamically favorable. 3. Incubation of mitochondria with dinitrophenol induces: a. non-specific activation of coenzyme Q. b. inhibition of proton pumps in complex I. c. loss of proton gradient across the inner membrane. d. a general decrease in proton pumping across the intermembrane space.

Dominador T.