In this typical animal cell which structure would be used for locomotion?

The correct answer would be flagellum. It is this structure that is responsible for movement or locomotion. It is a slender structure that enables many microorganisms to swim around. It protrudes from the cell body of certain cells. Hope this answers the question. 

Dna overload will occur

I’m not exactly sure what your trying to ask, but if it’s how an organelle is similar to a body system or a part a nucleus is like a in function. but i don’t fully understand what you’re trying to ask