Multiple choice

Direction: Choose the appropriate answer from the options given below :

80S ribosomes are found in the eukaryotes and consist of two subunits; they are

  1. 20S and 60S

  2. 30S and 50S

  3. 40S and 40S

  4. 40S and 60S
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Eukaryotic 80S ribosomes consist of a large 60S subunit and a small 40S subunit (60+40=80). The 'S' stands for Svedberg units, which measure sedimentation rate during centrifugation, not molecular weight. Prokaryotic 70S ribosomes have 50S and 30S subunits.

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