Final answer:
The large subunit of a eukaryotic ribosome in S units is 60S, which is part of the 80S ribosome found in the cytoplasm of eukaryotic cells.
Step-by-step explanation:
The value in the large ribosome in S units of a Eukaryote is 60S. When eukaryotic ribosomes are not synthesizing proteins, they dissociate into large and small subunits, which then reassociate during the initiation of translation. The eukaryotic 80S ribosome in the cytoplasm is composed of a large 60S subunit, which contains the 5S, 5.8S, and 28S rRNA subunits, and a small 40S subunit, which contains the 18S rRNA subunit. While prokaryotic organisms, such as bacteria represented by E. coli, have 70S ribosomes comprised of a 50S large subunit and a 30S small subunit, eukaryotic cells have 80S ribosomes composed of a 60S large subunit and a 40S small subunit.