Which of the following statements regarding cilia is not correct ?

(a) The organized beating of cilia is controlled by fluxes of Ca2+ across the membrane

(b) Cilia are hair-like cellular appendages

(c) Microtubules of cilia are composed of tubulin

(d) Cilia contain an outer ring of nine doublet microtubules surrounding two single microtubules

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Which one of the following phenomena is commonly referred as 'cell drinking?

(a) Endocytosis

(b) Exocytosis

(c) Phagocytosis

(d) Pinocytosis

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If a chloroplast of plant is isolated and studied in a test tube the investigation is described as

(a) in vivo

(b) in vitro

(c) in situ

(d) none of these.

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An organelle present in plant cells but absent from those of animals is

(a) vacuole

(b) peroxisome

(c) glyoxysomes

(d) Both a and c

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Primary cell wall consists of a loose network of cellulose microfibrils impregnated with a matrix of

(a) glycoprotein and flavoprotein

(b) hemicellulose and flavoprotein

(c) hemicellulose and pectin

(d) flavoprotein and pectin.

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Which of the following is not a true subcellular organelle ?

(a) Peroxisome

(b) Ribosome

(c) Chloroplast

(d) Lysosome.

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Golgi body is associated with

(a) packaging and storage of material

(b) cell wall formation

(c) transport of enzyme

(d) all of the above

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Which of the following cytoskelelal components of an eukaryotic cell play a major role in protoplasmic streaming?

(a) Microtubules

(b) microfilaments

(c) Intermediate filaments

(d) None of these

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Free radicals in our body have been implicated in

(a) ageing

(b) certain degenerative disorders

(c) neurodegeneration

(d) all the above

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Which is not true for prokaryotic cells ?

(a) They are smaller than eukaryotic cells.

(b) They lack membrane-bound organelles.

(c) Their genetic material is localised within nucleoid.

(d) They contain a well developed cytoskeleton.

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