Which structure is absent in a typical prokaryotic cell?

Options

  • A. Ribosome
  • B. Cell membrane
  • C. Membrane-bound nucleus
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

C. Membrane-bound nucleus

Detailed Explanation

A membrane-bound nucleus is absent in typical prokaryotic cells. Their DNA lies in a region called the nucleoid. Prokaryotes do possess ribosomes and a cell membrane. Their ribosomes are generally 70S, whereas cytoplasmic ribosomes of eukaryotic cells are generally 80S. These differences are frequently tested in biology examinations.