NEET 2015 · Class 11

Cell: The Unit of Life

Which of the following are not membrane-bound?

  1. (A)Lysosomes
  2. (B)Mesosomes
  3. (C)Vacuoles
  4. (D)Ribosomes

The NCERT line that answers it

Verbatim line

They are composed of ribonucleic acid (RNA) and proteins and are not surrounded by any membrane.

Chapter
Cell: The Unit of Life
Section
8.5.6 Ribosomes
Page
13
Words matched
16 of 16

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

75, emb=0.9899, combined=0.8939). Verified: high — The span explicitly states 'are not surrounded by any membrane,' which directly and conclusively establishes that ribosomes are not membrane-bound, matching the correct answer D.

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