Question

The F0 subportion of ATP synthase contains the membrane-bound complex, and the F1 subportion consists of which of the following?

A) cytoplasmic tail
B) lipid bilayer
C) stalk and catalytic head
D) transmembrane domain

Answer 1

C) stalk and catalytic head

The F1 subportion of ATP synthase consists of the stalk and catalytic head, which contains the alpha and beta subunits where ATP synthesis occurs.

Step-by-step explanation:

The F1 subportion of ATP synthase consists of the stalk and catalytic head. While the F0 subportion contains the membrane-bound complex that functions as a proton channel and is embedded in the inner membrane, the F1 portion protrudes into the matrix of the mitochondrion. This F1 portion has a set of three α and three β subunits arranged alternately, forming the catalytic site where ATP is synthesized. The F1 γ subunit acts as a central stalk that is connected to the rotor of the F0 portion, allowing the transmission of the rotational energy necessary for the catalytic production of ATP.