Which sedimentation coefficient represents the prokaryotic ribosome and its dissociated subunits?
Answer and explanation
Correct answer: D. ribosome composed of and subunits
- Step 1: Svedberg units () measure sedimentation velocity, which depends on size, mass, and surface area.
- Step 2: Prokaryotes have ribosomes in the cytoplasm.
- Step 3: Upon lowering concentration, the ribosome dissociates into a large subunit and a small subunit ().
Answer
ribosome composed of and subunits.
Why not the others: composed of and is the eukaryotic cytoplasmic ribosome; incorrectly combines a eukaryotic small subunit with a prokaryotic small subunit; with and is an invalid subunit combination.
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