(i) Pili and fimbriae are the two surface extensions that are not concerned with motility.
(ii) Structure that helps in motility of bacterial cell is flagella.

Ribosomes are found in plant cell at following different sites
(i) Freely in the cytoplasm
(ii) Attached to ER in the cytoplasm
(iii) Inside mitochondria.
(iv) Inside plastids (chloroplasts).

The body of a multicellular organism has cell as a basic structural unit. The cells are organised to form tissues such as blood, bone, etc. The tissue are organised to form organs such as heart, kidney, etc. The organs are then organised to form organ systems such as digestive system, reproductive system respiratory system, etc. The various organ system of organism gets arranged to form a complete individual.

Lysosomes are the organelle known as suicide bags. They consist of a single membrane surrounding powerful digestive enzymes. If the membrane of a lysosome breaks, the enzymes released may also destroy the cell itself, giving lysosomes the name suicide bag.

Animal cells have an interior membrane that delimits a cell nucleus thus, they are eukaryotic cells. In these cells, the genetic material is located within the nucleolus whereas, the bacterial cells do not have organised cellular nuclei so, are called prokaryotic cells.