ANATOMY

Detailed explanation-1: -The structural and functional characteristics of different types of cells are determined by the nature of the proteins present. Cells of various types have different functions because cell structure and function are closely related.

Detailed explanation-2: -The cell types in a multicellular organism become different from one another because they synthesize and accumulate different sets of RNA and protein molecules. They generally do this without altering the sequence of their DNA.

Detailed explanation-3: -The bacterial and human cells look very different in size and shape. Although all living cells have certain things in common-such as a plasma membrane and cytoplasm-different types of cells, even within the same organism, may have their own unique structures and functions.

Detailed explanation-4: -Cells have different shapes because they do different things. Each cell type has its own role to play in helping our bodies to work properly, and their shapes help them carry out these roles effectively.