Question

what is the main function of the rough endoplasmic reticulum in a plant cell? to make lipids to direct cell activities by sending instructions to different parts of the cell to help ribosomes make proteins to store water, waste, and nutrients, such as sugar, in the cell

Explanation:

The rough endoplasmic reticulum (RER) is studded with ribosomes. Its main function is to assist ribosomes in protein - synthesis. Lipids are made by the smooth endoplasmic reticulum. The nucleus directs cell activities. The vacuole stores water, waste, and nutrients.

Answer:

to help ribosomes make proteins