Nucleus :It is the control center of the cell as it controls all the activities of the cell and it is a round body which is generally present at the centre of the cell .. it contains chromosome and nucleolus .
Organelles : they are body which are present in the cytoplasm and do lots of activities for the cell .. example of organelles : lysosome , Golgi body etc .
DNA: it is functional part of the chromosome and contains information which helps in inheritance of characters from parents to the offspring.
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