Uphill transport involves movement of molecules

along concentration gradient

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against concentration gradient

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without the help of transport proteins

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without expenditure of energy

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Solution

The correct option is B against concentration gradient
Uphill transport involves movement of molecules from a region of lower concentration to higher concentration against the concentration gradient with the expenditure of energy. Uphill transport requires special proteins called pumps that move molecules against concentration gradients using energy (ATP).

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Similar questions

Assertion (A): Active transport is uphill transport.

Reason (R): Active transport uses energy to pump molecules against the concentration gradient.

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