Choose the option that has only correct statements: i. Inclusion bodies which are found in prokaryotic cells are not bounded by any membrane system. ii. Ribosomes are the site of protein synthesis. iii. Pili are the surface structures of the bacteria which may play a role in motility. iv. The cell membrane of prokaryotes is structurally similar to the eukaryotes.

Step-by-step solution

Besides flagella, pili and fimbriae are also surface structures of the bacteria but do not play a role in motility. The pili are elongated tubular structures made of a special protein. The fimbriae are small bristle-like fibres sprouting out of the cell. In some bacteria, they are known to help attach the bacteria to rocks in streams and also to the host tissues.