Increased energy demands (increase in ATP being made in the cell) on the electron transport chain of oxidative phosphorylation should change the pH of the intermembrane of the mitochondria to...? Select one: a. More acidic due to the increase in protons being pumped. b. No change since pH is not altered with increased proton concentration. c. More basic due to the increase in protons being pumped.

When electrons flow along the electron transport chains of mitochondria, which of the following changes occurs? Group of answer choices A. ATP synthase pumps protons by active transport B. The pH of the matrix increases C. The electrons gain free energy D. The cytochromes phosphorylate ADP to form ATP

It makes sense that enzymes should be active when they are needed and inactive when they are not needed. Non-competitive (allosteric) regulation of enzymes is important in metabolism because it allows for the rapid adjustment of their activity.  Recall hexokinase, a key enzyme of glycolysis. Which of the following molecules likely functions as an allosteric inhibitor of its activity?      A.  ADP  B.  Glucose  C.  NAD+  D.  Pyruvate

What drives the rotation of the F1 head (rotor) of ATP synthase? a. proton movement from intermembrane space to the matrix b. proton movement from the matrix to the intermembrane space c. ATP hydrolysis d. ATP condensation e. proton movement from the cytoplasm to the intermembrane space

Oxidative phosphorylation requires all of the items listed below except... A. a terminal electron acceptor which is O2 in mitochondria. B. a matrix more positively charged than the inter membrane space. C. the flow of electrons from NADH and QH2 in the membrane. D. enzyme complexes embedded in a membrane. E. ATP synthase in the correct position in the membrane.

For each of the statements below, indicate whether they are true or false and then in detail explain why the false statements are incorrect, making reference to the relevant cell processes and/or molecules. A. In cellular respiration the ETC transfers electrons via redox reactions whereas in photosynthesis the ETC transfers electrons using light. B. In cellular respiration the ETC creates a proton gradient with the higher concentration on the outer side of the inner membrane whereas in photosynthesis the ETC creates a proton gradient with the higher concentration on the inner side of the thylakoid membrane. C. In cellular respiration the ETC gradient is used to power ATP production by oxidative phosphorylation whereas in photosynthesis the ETC gradient is used to power ATP production by substrate level phosphorylation.