Eukaryotic ribosomes are composed of small (_____) and large (_____) subunits, which come together to form a _____ ribosome.

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Multiple Choice

Eukaryotic ribosomes are composed of small (_____) and large (_____) subunits, which come together to form a _____ ribosome.

Explanation:
Ribosome size is described by Svedberg units, reflecting how they sediment during centrifugation. In eukaryotes, the cytoplasmic ribosome is 80S, built from a 40S small subunit and a 60S large subunit. When they come together, they form the functional 80S ribosome for protein synthesis. This is in contrast to prokaryotes, where the cytoplasmic ribosome is 70S made from a 30S small subunit and a 50S large subunit. It’s worth noting that organelles like mitochondria and chloroplasts in eukaryotic cells retain the bacterial-like 70S ribosomes, but the cytoplasmic ribosome itself is 80S.

Ribosome size is described by Svedberg units, reflecting how they sediment during centrifugation. In eukaryotes, the cytoplasmic ribosome is 80S, built from a 40S small subunit and a 60S large subunit. When they come together, they form the functional 80S ribosome for protein synthesis. This is in contrast to prokaryotes, where the cytoplasmic ribosome is 70S made from a 30S small subunit and a 50S large subunit. It’s worth noting that organelles like mitochondria and chloroplasts in eukaryotic cells retain the bacterial-like 70S ribosomes, but the cytoplasmic ribosome itself is 80S.

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