Std XI Cell
1. Bone digestors or osteoclasts are rich in a) lysosomes b) vacuole c) Golgi complex d) E.R. 2. The smallest living cells with the cell wall are a) viriods b) protista c) mycoplasma d) bacteria 3. Microtubules are the constituents of a) cilia,flagella and peroxisomes b) spindle fibres,centrioles and cilia c) centrioles, spindle fibres and chromatin d) centrosome,nucleosome and centrioles 4. Mitochondria and chloroplast are i) semi-autonomous organelles ii) formed by division of pre existing organelles and they contain DNA but lack protein synthesising machinery. a) both are correct b) i is true but ii is false c) ii is true but i is false d) both are false 5. The spherical head of the oxysome is a) dictyosome b) F1 subunit c) F0 subunit d) granum