Question

Electron transport chain (ETC) is a set of __________ electron carries present in a specific sequence along mitochondrial membrane.

• A. seven, inner
• B. six, inner
• C. seven, outer
• D. six, outer

Answer 1

The correct option is A seven, inner

In electron transport chain, there are 7 electron acceptors, which are as follows $Co-Q\to Cytb\to Cyt{c}_1\to Cytc\to Cyta\to Cyt{a}_3\to O_2$. Oxygen is the ultimate electron acceptor. These electron acceptors are present in a specific sequence along inner mitochondrial membrane.