Which one of the following is absent in animal cells?

جانوروں کے خلیوں میں مندرجہ ذیل میں سے کون سا غیر حاضر ہے؟

Protein

Cellulose

Salts

None of these

Cellulose is a structural component of plant cell walls, absent in animal cells.

Animal cells lack a rigid cell wall and instead have a flexible plasma membrane.