The percentage of cell surface that is impenetrable for ions is

(1) 1 %

(2) 99.9 %

(3) 90 %

(4) 73 %

The property of semipermeability belongs to

(1) cell wall

(2) plasma membrane

(3) mitochondria only

(4) None of the above

Microtubules are absent in

(1) mitochondria

(2) flagella

(3) spindle fibres

(4) centriole

Which of the following four cell structures is correctly matched with the accompanying description?

(1) Plasma membrane - Outer layer of cellulose or chitin, or absent

(2) Mitochondria - Bacteria like elements with inner membrane forming sacs containing chlorophyll, found in plant cells and algae

(3) Chloroplasts - Bacteria like elements with inner membrane highly folded

(4) Golgi apparatus - Stacks of flattened vesicles

Which one of the following is incorrect statement

(1) All organisms are composed of cells

(2) Cell is the basic unit of life

(3) All inanimate things are made up of cells

(4) Virus is acellular

Which one of the following is incorrect statement

(1) Organisms composed of single cell are unicellular

(2) Organisms composed of many cells are multicellular

(3) Organisms which are not composed of any cell are acellular

(4) Organisms which are composed of single cell is acellular

Which of the following is true

(1)cell is the basic unit of life

(2)cell is present in all living organisms

(3)cell is the basic unit of body of organism

(4)All of these

Which of the following is true about unicellular organism ?

(1)anything less than a complete structure of a cell does not ensure independent living

(2)it is capable of independent existence

(3)cell is structural and functional unit

(4)All of the above

With the discovery of which of the following, the study of the structural details was made possible

(1)compound microscope

(2)electron microscope

(3)cryo-electron microscope

(4)Fluorescent microscope

Which of the following is true about Robert Hooke?

(1)He saw first cell

(2)He saw first dead cell

(3)He saw first cell wall

(4)All of the above