Q4 of 10 Page 8

What are the characteristics of prokaryotic cells.

(1) Prokaryotes have cell wall surrounding the cell membrane. (2) They do not have a well defined nucleus. (3) The genetic material is not covered by a nuclear membrane. (4) Extra chromosomal DNA called plasmids is present in the cytoplasm. (5) Prokaryotes do not have membrane bound organelles.

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2 How do neutral solutes move across the plasma membrane? Can the polarmolecules also move across it in the same way? If not, then how are thesetransported across the membrane? 3 Name two cell-organelles that are double membrane bound. What are the characteristics of these two organelles? State their functions and draw labeled diagrams of both. 5 Multi cellular organisms have division of labour. Explain. 6 Cell is the basic unit of life. Discuss in brief.