The percentage of cell surface that is impenetrable for ions is

(a) 1 %

(b) 99.9 %

(c) 90 %

(d) 73 %

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The property of semipermeability belongs to

(a) cell wall

(b) plasma membrane

(c) mitochondria only

(d) None of the above

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Microtubules are absent in

(a) mitochondria

(b) flagella

(c) spindle fibres

(d) centriole

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

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

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

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

(d) Golgi apparatus - Stacks of flattened vesicles

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Which one of the following is incorrect statement

(A) All organisms are composed of cells

(B) Cell is the basic unit of life

(C) All inanimate things are made up of cells

(D) Virus is acellular

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Which one of the following is  incorrect statement

(A) Organisms composed of single cell are unicellular

(B) Organisms composed of many cells are multicellular

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

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

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Which of the following is true

(A)cell is the basic unit of life

(B)cell is present in all living organisms

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

(D)All of these

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Which of the following is true about unicellular organism ?

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

(B)it is capable of independent existence

(C)cell is structural and functional unit

(D)All of the above

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Who invented cell?

(A)Anton Von Leeuwenhoek

(B)Robert Brown

(C)Robert Hooke

(D)None of these

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The first living cell was described by

1. Anton Von Leeuwenhoek

2. Robert Brown

3. Robert Hooke

4. Both A and B

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