The main arena of various types of activities of a cell is:
1. Plasma membrane
2. Mitochondria
3. Cytoplasm
4. Nucleus

Subtopic:  Cell Organisation |
 90%
From NCERT
AIPMT - 2010
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Difference between eukaryotes and prokaryotes is in:
1.  Circular ss DNA in prokaryotes
2.  Histone with prokaryotic DNA
3.  Operon in eukaryotes
4.  Membrane bound organelles in eukaryotes

Subtopic:  Cell Organisation |
 89%
From NCERT
AIPMT - 1998
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