2. Indicate whether each of the following statements about the mitochondrial ele

Question

2. Indicate whether each of the following statements about the mitochondrial electron transfer chain and oxidative (a) NADH dehydrogenase complex, cytochrome bc complex, and cytochrome oxidase are transmem- (b) Synthesized ATP must be transported into the intermembrane space before it can enter the cytosol. phosphorylation is true or false brane proteins. (e) (d) (e) (f) (g) Cytochrome c and the Fi subunit of ATPase are peripheral membrane proteins. Complexes I, II, III, and ? all are proton pumps. Ubiquinone is a hydrophilic molecule. Ubiquinone and the Fo subunit of ATP synthase are peripheral membrane proteins. The final electron acceptor is H20. 3. Which of the following experimental observations would not support the chemiosmotic model of oxidative phos- phorylation? A. If mitochondrial membranes are ruptured, oxidative phosphorylation cannot occur. B. Raising the pH of the fluid in the intermembrane space results in ATP synthesis in the matrix. C. Transfer of electrons through the respiratory chain results in formation of a proton gradient across the inner mitochondrial membrar D. The orientation of the enzyme complexes of the electron transfer chain results in a unidirectional flow of H E. Radioactively labeled inorganic phosphate is incorporated into cytosolic ATP only in the presence of an H gradient across the inner mitochondrial membrane. 4. The proton-motive force generated by the electron transfer chain: A. includes a pH-gradient component. B. includes an electrical-potential-gradient component. C. is used for active transport processes. D. is used to synthesize ATP E. has all of the above characteristics. ADH resnertively enter the electron transfer chain? Why must they

Explanation / Answer

2. a. False

b. False

c. True.

d. False. Complex II does not acts as proton pump.

e. Flase. Ubiquinone us hydrophobic in nature.

f. False. They are integral proteins

g. False. Final electron acceptor is oxygen

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.