Multiple choice

Which of the following is not correct?

  1. Cytoskeleton is present in eukaryotic cells and absent in prokaryotic cells.

  2. Endocytosis and exocytosis occur only in eukaryotic cells.

  3. Circular DNA in cytosol only occurs in prokaryotic cells.

  4. First eukaryotic cell on earth were born more than 3 billion years ago.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The fossil record shows that earliest eukaryotic cells evolved about 1.5 billion years ago. Details of the evolutionary path from prokaryotes to eukaryotes cannot be deduced from the fossil record alone, but morphological and biochemical comparison of modern organisms has suggested a reasonable sequence of events consistent with the fossil evidence.

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