Which of the following are the functions of cytoskeleton?

1. mechanical support

2. motility

3. maintenance of the shape of the cell

4. all of the above

Cytoskeleton is made up of

1. calcium carbonate granules

2. callose deposits

3. cellulosic microfibrils

4. proteinaceous filaments

Which of the following is not a part of the cytoskeleton?

1.  Microtubule

2.  Microfilament

3.  Intermediate filament

4.  Microfibril 

Microtubules are the constituents of

(1) spindle fibres, centrioles and cilia

(2) centrioles, spindle fibres and chromatin

(3) centrosome, nucleosome and centrioles

(4) cilia, flagella and peroxisomes