Answer:
C
Explanation:
Active transport is against gradient.. Or uphill movement.. So we have to spend energy.. Which are in the form of ATP(adenosinetriphosphate).
Active transport process require cellular energy to transport substance up their concentration gradients across the plasma membrane. Cellular energy usually in the form of ATP. Thus, c is correct option.
When movement of molecules is takes place then it is called active transport.
Active transport movement is always from lower concentration to a region of higher concentration gradients. So we can say that substance are moving their own concentration gradients.
Active transport requires the signal or input of cellular energy in the form of ATP( adenosine triphosphate).
ATP is generally energy carrying molecule which are found in all living organisms. Active transport system are always sensitive to metabolic poisons because these metabolic poisons interrupt the ATP supply.
Therefore, active transport process require cellular energy to transport substance up their concentration gradients across the plasma membrane. Cellular energy usually in the form of ATP. Thus c is correct option.
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