Q56 of 59 Page 39

Draw a well labelled diagram of an eukaryotic nucleus. How is it different from nucleoid?


Differences between nucleus and nucleoid:




























Nucleus



Nucleoid



Nucleus is the place where eukaryotes store their genetic material.



Nucleoid is the place where prokaryotes store their genetic material.



It is large and well organised.



It is small and poorly organised.



It is surrounded by double layered membrane.



Membrane is absent.



It contains many chromosomes.



It contains only single chromosome.



Nucleolus is present inside the nucleus.



Nucleolus is absent.



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54

Illustrate only a plant cell as seen under electron microscope. How is it different from animal cell?

55

Draw a neat labelled diagram of an animal cell.

57

Differentiate between rough and smooth endoplasmic reticulum. How is endoplasmic reticulum important for membrane biogenesis?

58

In brief state what happens when

(a) dry apricots are left for some time in pure water and later transferred to sugar solution?


(b) a Red Blood Cell is kept in concentrated saline solution?


(c) the Plasma-membrane of a cell breaks down?


(d) rheo leaves are boiled in water first and then a drop of sugar syrup is put on it?


(e) golgi apparatus is removed from the cell?