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Question 6

Which of the following features is common to prokaryotes and many eukaryotes?

(a) Chromatin material present

(b) Cell wall present

(c) Nuclear membrane present

(d) Membrane bound sub-cellular organelles present


Solution

(b) Presence of cell wall is the common feature that is observed in both prokaryotic and some eukaryotic cells.

Cell wall is present in bacteria (prokaryotes) and in plants (eukaryotes) however cell wall is absent in animal cells.Cell wall acts as protection unit for cell and also provides shape to the cell. Cell wall is made up of cellular, hemicellulose or pectins.

The genetic material in prokaryotes is naked and not enveloped by nuclear membrane.Choromatin material is present in eukaryotes only.

Sub-cellular organelles in prokaryotes are not well defined and are not membrane bound while eukaryotes have membranous organelles which are complex structure with multifunctions.


Biology
NCERT Exemplar
Standard XI

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