Question

what type of er are ribosomes attached to? pleated er smooth er rough er

Explanation:

In cell biology (a subfield of Biology, part of Natural Science), the endoplasmic reticulum (ER) has two types: rough ER and smooth ER. Rough ER is named so because it has ribosomes attached to its surface, giving it a "rough" appearance under a microscope. Smooth ER lacks ribosomes. "Pleated ER" is not a standard term for ER types. So ribosomes are attached to rough ER.

Answer:

C. rough ER (assuming the options are labeled as A. pleated ER, B. smooth ER, C. rough ER; if the original options have different labels, adjust accordingly to match the correct option text, e.g., if the third option is "rough ER", then the answer is the third option with its text)