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Biology question can someone help?

Is the same amount of RNA contained in a prokaryotic cell ribosomes found in a eukaryotic ribosomes?

Update:

Thank you ATP Man. If I could give you extra points for best answer, I'd give you 50.

3 Answers

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  • 1 decade ago
    Favorite Answer

    Bacteria do contain ribosomes. Eukaryotic: They are not considered a membrane bound organelle. Ribosomes are built from 2 subunits. Its only when these subunits are properly placed together that the ribosome becomes functional. The large subunit is composed of 45 proteins and 3 molecules of RNA while the small subunit consists of 33 proteins molecules and 1 RNA. Fully assembled it measures 20-30 nm. Sometime ribosomes work in units called polysomes.

    Ribosomes are composed of ribosomal RNA (rRNA) and protein. Ribosomes are composed of two subunits with densities of 50S and 30S. ("S" refers to a unit of density called the Svedberg unit.) The two subunits combine during protein synthesis to form a complete 70S ribosome about 25nm in diameter. A typical bacterium may have as many as 15,000 ribosomes.

  • 1 decade ago

    Actually, prokaryotic cells DONT have ribosomes. :)

    You must mean, do prokaryotes have as much genetic material dedicated to protein synthesis as do eukaryotic ribosomes?...(perhaps)

    The genetic material dedicated to protein synthesis in prokaryotes would definitely be lesser compared to the genetic material dedicated to protein synthesis in eukaryotes. Eukaryotes have more complicated structures, and would therefore need much more genetic material to complement in the making of these proteins.

    And also taking into account that organelles can make their own proteins, therefore, organelles have their own genetic material capable of playing a role in protein synthesis. This, along with the cell's actual genetic material, make for more DNA/RNA involved in protein synthesis, compared to prokaryotic cells.

    :)

  • Anonymous
    1 decade ago

    to the first girl who answered, prokaryotic cells do contain ribosomes :)

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