Which one is incorrect

(1)Mycoplasmas are greater than bacteria

(2)largest isolated cell is ostrich egg

(3)Nerve cells are longest cells

(4)The shape of the cell may vary with  the function they perform

The organelle common among prokaryotic and eukaryotic cell is

(1) centrosome

(2) ribosome

(3) peroxisome

(4) glyoxysome

The main arena of various types of activities of a cell is

1. plasma membrane

2. mitochondrion

3. cytoplasm

4. nucleus

Nerve cell is

(1) largest and branched

(2) longest and branched

(3) longest and unbranched

(4) largest and unbranched

Which of the following sequence is correct with respect to size?

1.  Eukaryotic cell > PPLO > Viruses > Bacteria

2.  Eukaryotic cell > Bacteria > PPLO > Viruses

3.  Eukaryotic cell > PPLO > Bacteria > Viruses

4.  Eukaryotic cell > Viruses > PPLO > Bacteria 

Different cells have different sizes. Given are the following cells:
I. Mycoplasma 
II. Ostrich eggs
III. Human RBC
IV. Bacteria
The correct ascending order of their size of the cells given above will be : 
1.  I, IV, III, II   
2.  I, I, IIL, IV
3.  II, I, III, IV 
4.  III, II, I, IV