Question

question ribosomes are found ______. select all that apply in the cytosol on the smooth endoplasmic reticulum only in the nucleus on the rough endoplasmic reticulum

Explanation:

To solve this, we analyze the location of ribosomes:

• Ribosomes are found free in the cytosol (cytoplasmic ribosomes) and bound to the rough endoplasmic reticulum (RER, where they make proteins for secretion or membrane insertion).
• Smooth endoplasmic reticulum (SER) lacks ribosomes (it is involved in lipid synthesis, etc.).
• Ribosomes are not only in the nucleus (they are also in the cytoplasm and on RER).

Answer:

• in the cytosol
• on the rough endoplasmic reticulum