Question

in prokaryotic cells, gene expression is inherently different than gene expression in eukaryotic cells. why?

• translation cannot occur on ribosomes in a prokaryotic cell.
• prokaryotic cells do not use codons and anticodons.
• gene expression in prokaryotic cells involves nucleotides that are not found in eukaryotic cells.
• prokaryotic cells use carbohydrates, instead of nucleic acids, to store genetic information.

Explanation:

Prokaryotic cells lack a membrane-bound nucleus, so transcription (DNA to mRNA) happens in the cytoplasm, unlike eukaryotes where it occurs in the nucleus. Other options are incorrect: prokaryotes use ribosomes for translation, use codons/anticodons, share the same nucleotides as eukaryotes, and store genetic info in nucleic acids (not carbohydrates).

Answer:

A. Transcription cannot occur in a nucleus in a prokaryotic cell.