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Assertion (A) : Ribosomes are considered the most primitive cell organelles.
Reason (R) : Ribosomes occur in all eukaryotic organisms.

The correct answer is:

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Important Questions on Cell : The Unit of Life

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If you fractionate all the organelles from the cytoplasm of a plant cell. In which one of the following sets of fractions will you find nucleic acids?
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Plasmolysis is not observed in boiled plant tissue because :
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If the analogy of a city is applied to a eukaryotic cell then which of the following statements is correct?
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Grapes were put in a concentrated sugar solution. On examination after 12 hours, the grapes were shrunken. This is because,
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Mitochondria are associated with all of the following functions, EXCEPT:
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An animal cell was grown in a culture medium containing P32 nucleotides, the parts from which DNA is built. Later examination of the cell showed the radioactivity to be concentrated in the:
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Stroma in the chloroplasts of higher plant contains
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A red blood corpuscle (RBC) was kept in a solution and treated so that it become inside-out. What will be the polarity of the phospholipid bilayer in this cell?