Question

what is the main function of the rough endoplasmic reticulum in a plant cell? to produce steroid hormones to control which substances enter and leave the cell to fill the space between the cell membrane and the nucleus to help ribosomes make proteins

Explanation:

• Analyze each option:
• "to produce steroid hormones": Smooth ER (not rough ER) is involved in steroid hormone production. Eliminate this.
• "to control which substances enter and leave the cell": This is the function of the cell membrane, not rough ER. Eliminate this.
• "to fill the space between the cell membrane and the nucleus": The cytoplasm fills this space, not rough ER. Eliminate this.
• "to help ribosomes make proteins": Rough ER has ribosomes attached and assists in protein synthesis by ribosomes. This matches the function of rough ER.

Answer:

to help ribosomes make proteins