Question

The parts of an oxysome are

• A. Head, neck and bulb
• B. Head, base and stalk
• C. Sheath, neck and base
• D. Head, sheath and base

Answer 1

The correct option is B Head, base and stalk

The F${}_0$F${}_1$ complex or ATP synthase has two principal components F${}_0$ and F${}_1$, both of which are multimeric proteins. The F${}_0$ component has three types of integral membrane proteins designated as a, b and c. In all cases, the c subunit forms two donut shaped ring in the plane of membrane. The a and two b subunits are rigidly linked to one another but not to the ring of c subunit. The a, b and c chains of F${}_0$ component represent the base of F${}_0$F${}_1$ particles. The F${}_1$portion is a water soluble complex of five distinct polypeptides (three units each of $\alpha$ and $\beta$ and one unit each of $\gamma$, $ϵ$ and $\eta$). The F${}_1$ gamma subunit fits into c subunit of F${}_0$. This represents the so called stalk. The head is formed by alternating units of $\alpha$ and $\beta$ chains.