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What is the correct answer?

4

Cellular components can be physically separated from each other by

A. centrifugation

B. radioactive tracers

C. microscopy

D. chromatography

Correct Answer :

A. centrifugation


Related Questions

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One of the following is a single-membraned structure:

A. Chloroplast

B. Nucleus

C. Mitochondria

D. Lysosome

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Function of Golgi bodies in plants is

A. transport of mutabolities

B. translocation of enzymes

C. synthesis of cell-wall

D. production of microbodies

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Intake of liquid food by formation of food vacuoles is called

A. pinocytocis

B. phagocytosis

C. absorption

D. imbibition

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The maximum magnification possible with electron microscope is

A. 200 times

B. 2000 times

C. 20,000 times

D. 200,000 times

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The organelles for fat synthesis are

A. glyoxisomes

B. lomasomes

C. spherosomes

D. lysosomes

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In centriole, microtubules are arranged in this order:

A. 9 + 2

B. 9 + 4

C. 9 + 0

D. 9 + 1

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Cell membranes are composed mainly of

A. sugar and proteins

B. lipids and proteins

C. starch and lipids

D. sugar and lipids

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"The substance of cells is living " was firs suggested by

A. Purkinje

B. Lamarck

C. Dutrochet

D. Dujardin

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Ribosomes of plastids and mitochondria are

A. 55S to 70S

B. 80S

C. 40S

D. 60S

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Nobel prize for RNA synthesis was awarded to

A. A. Kornberg

B. S.Ochoa

C. H. Khorana

D. Nirenberg

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4

One angstrom is equal to

A. 10-8cm

B. 10-8m

C. 10-6m

D. 10-7m

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4

The cell size is dependent upon

A. oxygen supply

B. nutrition

C. regulation by nucleus

D. all of die above

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Chemical constitution of nucleus is

A. DNA and proteins

B. RNA and proteins

C. DNA, RNA and proteins

D. RNA arid DNA

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In electron microscope the source of light used is

A. sunlight

B. UV-light

C. far red

D. beam of electrons

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Ribosomes are the centre of

A. respiration

B. photosynthesis

C. protein synthesis

D. fat synthesis

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The "chromosome theory of heredity" was given by

A. Sutton and Bateson

B. Bateson and Punnett

C. Sutton and Boveri

D. Waldeyer and Hofmeister

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4

Another name for ligase is

A. joining enzyme

B. RNA polymerase

C. nuclease

D. none of these

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Mitochondria were first observed in striated muscle cells by

A. Benda

B. Kolliker

C. Altmann

D. Robert Hooke

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According to cell theory

A. all cells have nuclei

B. all cells are living

C. cells, are fundamental units of all the living organisms

D. cells arise from pre-existing cells

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Granal thylakoids occur in a

A. chloroplast

B. mitochondrion

C. microtubules

D. crista

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Lysosomes were discovered by

A. Porter

B. DeDuve

C. Palade

D. Golgi

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Carbohydrate is synthesized from fat within

A. lysosome

B. spherosome

C. glyoxysome

D. lomasome

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The cells were first seen microscopically by

A. Scheiden

B. Schwann

C. Leeuwenhock

D. Robert Hook

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The discoverers of electron microscope are

A. Huxley and Virchow

B. Leeuwenhok and Hooke

C. Knoll and Ruska

D. Farmer and Moore

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The nucleus of a prokaryotic cell is represented by

A. a well-defined nuclear membrane

B. nucleolus only

C. double stranded circular DNA

D. single stranded DNA

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 The function of cristae in a mitochondrion is

A. electron transport and ATP synthesis

B. carbon assimilation

C. intake of o2

D. elimination of co2

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Physical basis of life is

A. nucleus

B. cell

C. protoplasm

D. nutrition

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In the mitochondria, cytochromes are localised in

A. matrix

B. outer membrane

C. inner membrane

D. none of these

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Janus-green-B is used for staining

A. ribosomes

B. chloroplast

C. mitochondrion

D. all of these

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Cell theory was proposed by

A. M.J. Schleiden and Theodore Schwann in 1838 and 1839 respectively

B. M.J. Schleiden and Theodore Schwann in 1939 only

C. Theodore Schwann and M.J. Schleiden in 1938 only

D. T.J. Schleiden and M.J. Schwann in 1838 only.