Which of these components of a cell functions like the digestive system in the human body, endoplasmic reticulum, golgi apparatus, mitchondria, plasma membrane

Well the endoplasmic reticulum has both smooth and rough bodies. Smooth is the synthesis of fats and detoxifies harmful bodies. Mostly in the liver. And the rough mainly synthesize proteins which are basic components of life. Proteins are sent all over the body and are used for many functions. The golgi is used to package those proteins and send those proteins through the body. Mitochondria creates energy and is the power house of the cell. And the plasma membrane is like the gate keeper. Decides what can enter it exit the cell and prevents harmful things from coming in. Allows proteins to leave.

C: Mitchondriatakes in nutrients and breaks them down which is similar to the digestive system.

C) to ensure each new cell has an exact copy of the dna