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The processes of diffusion and active transport are both used to

September 24, 2019

 

The processes of diffusion and active transport are both used to

  1.  break down molecules to release energy

  2.   move molecules into or out of cells of the

    body

  3.   bring molecules into cells when they are

    more concentrated outside of the cell

  4.   move molecules against a concentration

    gradient, using ATP molecules

 

Answer: Choice 2 is the correct answer

Explanation: Diffusion is the passive movement of particles from the area of higher concentration to the area of lower concentration. This change in concentration is called concentration gradient. Diffusion is a passive process and does not require energy. Active transport is the movement of particles from lower concentration to higher concentration. Therefore particles move against the concentration gradient. Active transport requires energy to occur.

Choice 3 describes diffusion only. Choice 4 describes active transport only. Choice 1, breaking down molecules to release energy, is not connected to the transport. Therefore, choice 2 is the correct answer since it describes both diffusion and active transport. 

This is a question from January 2018 Biology Regent 

 

At Transformation Tutoring, we love sciences, especially biology. Our biology tutors are graduates of top universities such as Columbia, NYU, and Harvard.

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