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.

• Prosthetic groups, such as iron-sulfur centers, are directly involved with electron transfer. 

• The reactions of the ETC take place in the outer membrane of mitochondria. 

• Electron carriers in the mitochondrial matrix include ubiquinone (coenzyme Q), FMN, and cytochrome c. 

• The outer membrane of mitochondria is readily permeable to small molecules and hydrogen ions. 

• Electrons generated by the citric acid cycle in the mitochondrial matrix enter the ETC. 

• Electron carriers are organized into four complexes of proteins and prosthetic groups. 

• Electron transfer in the ETC is coupled to proton transfer from the matrix to the intermembrane space. 

Answer 1

Explanation :

1) Prosthetic groups, such as Iron-Sulfur centers are directly involved in electron transfer -True. It is these Fe-S centres that accept and then transfer electrons.

2) Electrons carriers are organized into four complexes of proteins and prosthetic groups - True. The previous explanaination says about it.

3) The inner membrane of mitochondria is readiry permeable to small molecules ond hydrogen ions - False.Mitochondrial membranes are typical lipid bilayers like plasma membrane that do not allow charged particles.