Which statement is not true about eukaryotic ribosomes?
A) Ribosomes found in mitochondria are 70S rather than the 80S type found in the cytoplasm.
B) Both bound and free ribosomes consist of a 40S and a 60S subunit.
C) Bound ribosomes produce proteins that are destined for secretion from the cell.
D) Bound ribosomes are attached to the endoplasmic reticulum (ER).
E) Bound ribosomes are always bound while free ribosomes are always free.
Answer: E
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