Which of the following correctly identifies active transport?
A. Transport proteins move large molecules from areas of low.
B. Transport proteins move large molecules from areas of low concentration areas of high concentration areas without the use of cellular energy.
C.Small molecules move from areas of high concentration to areas of low concentration using cellular energy to enter a cell.
D. Small molecules move from areas of low concentration to areas of high concentration without cellular energy to enter a cell.
Please help I think its B.
1. D - Transport proteins move large molecules from areas of low concentration to areas of high concentration using cellular energy.
2.A- Transport proteins move large molecules from areas of low concentration to areas of high concentration using cellular energy.
3.D- Osmosis refers specifically to the diffusion of water.
4.B- from areas of higher concentration to areas of lower concentration.
5.B- exocytosis.
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Active transport is usually associated with accumulating high concentrations of molecules that the cell needs, such as ions, glucose and amino acids. If the process uses chemical energy, such as from adenosine triphosphate (ATP), it is termed primary active transport.
To determine the correct answer, let's go through the options one by one and explain the process of active transport:
A. Option A states that transport proteins move large molecules from areas of low concentration to areas of high concentration without the use of cellular energy. However, active transport requires the input of energy to move substances against their concentration gradient, so option A is incorrect.
B. Option B states that transport proteins move large molecules from areas of low concentration to areas of high concentration without the use of cellular energy. This statement is incorrect. Active transport involves the movement of molecules or ions against their concentration gradient, therefore, energy in the form of ATP is required. Consequently, option B is incorrect.
C. Option C states that small molecules move from areas of high concentration to areas of low concentration using cellular energy to enter a cell. This statement is also incorrect. Active transport involves the movement of molecules against the concentration gradient, so option C does not describe active transport accurately.
D. Option D states that small molecules move from areas of low concentration to areas of high concentration without cellular energy to enter a cell. This statement is incorrect, as active transport requires the input of cellular energy to move substances against their concentration gradient.
After examining all the options, we can conclude that none of them correctly identify active transport. None of the given options accurately describe the process of active transport.