Mitochondria and chloroplast are believed to be bacterial endosymbiont because
I. they have self nucleic acid i.e., circular ds, DNA and RNAs
II. 70s ribosomes
III. their membrane resembles that of bacteria
IV. ETS and ATP forming machinery is present.
(1) I and II
(2) I, II and III
(3) All of these
(4) I and IV
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf a biochemical analysis of mitochondria has to be done, the best procedure would be
(1) select cells which have a larger number of mitochondria
(2) plasmolyse the cell and filter out the mixture and take the debris
(3) grind the cells and filter out the mixture and take the debris
(4) subject the cell to cell fractionation (centrifuge) and obtain mitochondria
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following structure is an organelle within an organelle?
(1) Ribosome
(2) Peroxysome
(3) ER
(4) Mesosome
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySER and RER can be distinguished with its presence in
(1) protein synthesising cells
(2) protein and fat synthesising cells
(3) carbohydrates and fat synthesising cells
(4) lipid and protein synthesising cells
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFluid mosaic model of plasma membrane was given by
(1) Robertson
(2) Robert Hooke
(3) Singer and Nicholson
(4) Gorter and Grendel
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe percentage of cell surface that is impenetrable for ions is
(1) 1 %
(2) 99.9 %
(3) 90 %
(4) 73 %
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe property of semipermeability belongs to
(1) cell wall
(2) plasma membrane
(3) mitochondria only
(4) None of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMicrotubules are absent in
(1) mitochondria
(2) flagella
(3) spindle fibres
(4) centriole
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology