Question

The appearance of which of the following distinguishes eukaryotic cells from lower units of life?

  • DNA
  • RNA
  • Membrane
  • Nucleus

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Answer

The correct option is Nucleus.

Explanation:

  • Nucleic acids such as DNA and RNA, as well as proteins, can be found in viruses, which are not classified as either prokaryotic or eukaryotic.
  • Prokaryotic cells do contain membranes and certain organelles like ribosomes, but they lack a membrane-bound nucleus or membrane-bound organelles.
  • Eukaryotic cells are distinct in that they possess a membrane-bound nucleus, which is not found in prokaryotic cells.

Therefore, the presence of a nucleus is what distinguishes eukaryotic cells from other lower forms of life.


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