Eukaryotic ribosomes are typically:
A50S (only small subunit, in bacteria)
B70S (prokaryotic, smaller cells)
C80S (in cytoplasm, made of 60S + 40S)
D100S (a hypothetical large form)
Answer & Solution
Correct answer: C. 80S (in cytoplasm, made of 60S + 40S)
Eukaryotic ribosomes: 80S (composed of 60S large + 40S small subunits). Prokaryotic: 70S (50S + 30S). Mitochondrial + chloroplast ribosomes: 70S (like bacteria; supports endosymbiotic origin).
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