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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Drops of blue food coloring are placed in water and spread throughout the water, turning it blue.
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A potato slice is placed in water and water molecules from inside the potato move into the surrounding water.
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Both Answers
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Neither answers
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Detailed explanation-1: -Passive mechanisms like diffusion use no energy, while active transport requires energy to get done.
Detailed explanation-2: -Passive transport is a naturally occurring phenomenon and does not require the cell to expend energy to accomplish the movement. In passive transport, substances move from an area of higher concentration to an area of lower concentration in a process called diffusion.
Detailed explanation-3: -Primary active transport directly uses a source of chemical energy (e.g., ATP) to move molecules across a membrane against their gradient.
Detailed explanation-4: -Sodium-potassium pump, the most important pump in the animal cell is considered as an example of primary active transport. In this process of transportation, the sodium ions are moved to the outside of the cell and potassium ions are moved to the inside of the cell.