CELL STRUCTURES AND FUNCTION
CELL STRUCTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Sun
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Wind
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Energy
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Channels
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Detailed explanation-1: -To move substances against a concentration or electrochemical gradient, a cell must use energy. Active transport mechanisms do just this, expending energy (often in the form of ATP) to maintain the right concentrations of ions and molecules in living cells.
Detailed explanation-2: -Active transport mechanisms require the use of the cell’s energy, usually in the form of adenosine triphosphate (ATP).
Detailed explanation-3: -Active transport requires energy for the process by transporting molecules against a concentration or electrochemical gradient.
Detailed explanation-4: -Nutrients, such as sugars or amino acids, must enter the cell, and certain products of metabolism must leave the cell. Such molecules diffuse passively through protein channels in facilitated diffusion or are pumped across the membrane by transmembrane transporters.