Question

final assessment - plant science basics: plant processes
plant science basics: plant processes

8 of 20

what is the main function of the rough endoplasmic reticulum?

○ filter harmful toxins in the cell

○ support plant cell walls

○ modification of proteins

○ synthesis of lipids

Explanation:

• The rough endoplasmic reticulum (RER) has ribosomes on its surface. These ribosomes synthesize proteins, and the RER is involved in the modification (such as folding, adding sugar groups) of these newly synthesized proteins.
• "Filter harmful toxins in the cell" is a function of the smooth endoplasmic reticulum or other organelles like lysosomes in some cases, not the RER.
• "Support plant cell walls" is not a function of the RER; structures like the cell wall itself and the cytoskeleton have roles in support.
• "Synthesis of lipids" is a function of the smooth endoplasmic reticulum, not the rough ER which is associated with protein - related processes.

Answer:

C. Modification of proteins