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In detail as marks concern.
Solution
The solution to question b has been provided below-
b.
Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration—against the concentration gradient. Since the movement is against the gradient, thus active transport requires cellular energy to achieve this movement.
Role of plasma-membrane
The plasma membrane is selectively permeable. Thus it regulates what enters and exits the cell.
The membrane also maintains the cell potential. The cell membrane thus works as a selective filter that allows only certain things to come inside or go outside the cell. The cell employs a number of transport mechanisms that involve biological membranes. One of them is active transport which requires spending energy in form of ATP for movement of particles. The carrier proteins that facilitate this movement are also located on the plasma membrane, which thereby becomes crucial for the active transport.
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The solution to question b has been provided below-
b.
Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration—against the concentration gradient. Since the movement is against the gradient, thus active transport requires cellular energy to achieve this movement.
Role of plasma-membrane
The plasma membrane is selectively permeable. Thus it regulates what enters and exits the cell.
The membrane also maintains the cell potential. The cell membrane thus works as a selective filter that allows only certain things to come inside or go outside the cell. The cell employs a number of transport mechanisms that involve biological membranes. One of them is active transport which requires spending energy in form of ATP for movement of particles. The carrier proteins that facilitate this movement are also located on the plasma membrane, which thereby becomes crucial for the active transport.
For remaining queries, we request you to post them in separate threads to have rapid assistance
from our experts.