Question

ariana garcia apontes practice r9 identify functions of animal cell parts what is the main function of the endoplasmic reticulum in an animal cell? to help ribosomes make proteins to control which substances enter and leave the cell to break down sugar and release energy that the cell can use to store water, waste, and nutrients, such as sugar, in the cell

Explanation:

1. Analyze each option:

• Option 1: The endoplasmic reticulum (ER), especially the rough ER with ribosomes, helps in protein synthesis by providing a site for ribosomes to make proteins and also helps in processing and transporting those proteins.
• Option 2: The cell membrane controls which substances enter and leave the cell, not the endoplasmic reticulum.
• Option 3: Mitochondria are responsible for breaking down sugar (glucose) and releasing energy (ATP) for the cell, not the endoplasmic reticulum.
• Option 4: Vacuoles (in animal cells, small and temporary) or large central vacuoles (in plant cells) store water, waste, and nutrients. The endoplasmic reticulum does not have this storage function.

Answer:

to help ribosomes make proteins