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Question

Which of the following statement is associated with the flow of cytoplasm of an active Amoeba?

A
Propelled by microfilaments for lipid synthesis
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B
An adaptation for extracellular digestion
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C
Composed of microtubules and extracellular matrix
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D
Dependent on microfilaments for intracellular circulation
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E
Required for nerve transmission
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Solution

The correct option is D Dependent on microfilaments for intracellular circulation
Cytoplasmic streaming refers to rotational movement or streaming of liquid portion of cytoplasm (the cytosol) as mediated by actin filaments of the cytoskeleton. It helps in intracellular circulation of materials in Amoeba. Extracellular digestion in Amoeba is carried out by pseudopodia, not by cytoplasmic streaming. Thus, the correct answer is option D.

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