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NEET2026BiologyChapterActual

Match List I with List II regarding ribosomes and select the correct option. List-I List-II A. Eukaryotic cytoplasmic ribosome I. Consists of 50S and 30S subunits B. Prokaryotic ribosome II. Indirect measure of density and size C. Svedberg's unit ('S') III. First observed ribosomes under the electron microscope D. George Palade IV. Consists of 60S and 40S subunits

Options

  1. AA - I, B - IV, C - II, D - III
  2. BA - IV, B - I, C - II, D - III
  3. CA - IV, B - I, C - III, D - II
  4. DA - I, B - IV, C - III, D - II

Correct answer

B. A - IV, B - I, C - II, D - III

Step-by-step solution

Eukaryotic cytoplasmic ribosomes are 80S ribosomes, which consist of two subunits: 60S (large) and 40S (small). Prokaryotic ribosomes are 70S ribosomes, which consist of two subunits: 50S (large) and 30S (small). Svedberg's unit ('S') stands for the sedimentation coefficient, which indirectly measures the density and size of the ribosomal subunits. George Palade (1953) first observed ribosomes as dense particles under the electron microscope. Thus, the correct matching is A - IV, B - I, C - II, D - III. Answer: A -

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