The electron transport chain (ETC), or respiratory chain, is linked to proton mo

Question

The electron transport chain (ETC), or respiratory chain, is linked to proton movement and ATP synthesis. Select the statements that accurately describe the electron transport chain. Choose all that apply The outer membrane of mitochondria is readily permeable to small molecules and hydrogen ions. Electron carriers are organized into four complexes of proteins and prosthetic groups. Electrons generated by the citric acid cycle in the intermembrane space enter the ETC. Electron carriers in the ETC include ubiquinone (coenzyme Q) and cytochrome c. The reactions of the ETC take place in the outer membrane of mitochondria space. Prosthetic groups, such as iron-sulfur centers, are directly involved with electron transfer.

Explanation / Answer

Answer: Options i, ii, iv, vi, and vii are correct.

Explanation:

i. The mitochondrial outer membrane is permeable to protons.

ii. ETC contains four carrier complexes.

TCA cycle occurs in the mitochondrial matrix.

iv. Electron carriers in ETC = NADH dehydrogenase, CoQ, Cytochrome bc1 complex and cytochrome oxidase complex.

The reactions of ETC takes place on the inner mitochondrial membrane.

vi. Electron transfer is coupled to proton transfer into the intermembrane space.

vii. Electron carrier complexes contain prosthetic groups such as Cu+2 or Fe-S.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

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