Question

Uphill transport involves movement of molecules

• A. along concentration gradient
• B. against concentration gradient
• C. without the help of transport proteins
• D. without expenditure of energy

Answer 1

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).