THE CELL
TRANSPORT INTO AND OUT OF THE CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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uses passive transport
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is a carrier protein
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is located in the cytoplasm of a cel
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transports sugar molecules
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Detailed explanation-1: -Active transport is the energy-requiring process of pumping molecule s and ions across membranes “uphill”-against a concentration gradient. To move these molecules against their concentration gradient, a carrier protein is needed.
Detailed explanation-2: -ATP-driven carrier proteins are those that require ATP coupling to move molecules. A specific carrier example that is ATP-driven is the sodium-potassium pump in the plasma membrane of animal cells.
Detailed explanation-3: -Active Transport Carrier Proteins An important example of active transport is the sodium potassium pump. This carrier protein moves two sodium ions out of the cell and three potassium ions into the cell and hydrolyses ATP, or cellular energy, in the process.