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Question

Pinocytosis and active transport are similar because both processes

A
Increase absorption
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B
Require energy
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C
Depend upon cyclosis
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D
All of the above
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Solution

The correct option is B Require energy
Pinocytosis is bulk intake of fluid, ions and molecules through development of small endocytotic vesicles of 100 to 200 nanometers in diameter. ATP, calcium ions, fibrillar protein clathrin and contractile protein actin are required. Fluid phase pinocytosis is called as 'Cell Drinking'.
Active transport occurs with the help of energy input usually against concentration gradient. Cell membranes possess carriers and gated channels for active transport.

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