Which of These Statements Does NOT Apply to Ribosomes

Question

Which of these statements does NOT apply to ribosomes
A)They are composed of RNA.
B)They assemble polypeptides.
C)They may be bound to endoplasmic reticulum.
D)They are covered by a membrane.

Accepted Answer

Ribosomes are not covered by a membrane. They are composed of ribosomal RNA and protein, and they assemble polypeptides. Some ribosomes may be bound to the endoplasmic reticulum, but they themselves do not have a membrane covering.