A biologist conducts an experiment designed to determine whether a particular type of molecule is transported into cells by simple diffusion, facilitated diffusion, or active transport. He collects the following information: 1) The molecule is very small. 2) The molecule is polar. 3) The molecule can accumulate inside cells even when its concentration inside the cell initially is higher than it is outside the cell. 4) Cells use up more energy when the molecule is present in the environment around the cells than when it is not present. The biologist concludes that the molecule moves across cell membranes by facilitated diffusion. Do you agree with his conclusion?

Question

Danica Ferrell

Biology

17 March, 23:58

A biologist conducts an experiment designed to determine whether a particular type of molecule is transported into cells by simple diffusion, facilitated diffusion, or active transport. He collects the following information: 1) The molecule is very small. 2) The molecule is polar. 3) The molecule can accumulate inside cells even when its concentration inside the cell initially is higher than it is outside the cell. 4) Cells use up more energy when the molecule is present in the environment around the cells than when it is not present. The biologist concludes that the molecule moves across cell membranes by facilitated diffusion. Do you agree with his conclusion?

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Answers (1)

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Talan Brandt · Answer 1

No, this is not a facilitated diffusion but an Active transport process.

Explanation:

This is an active transport process because -

The molecules are moving against the concentration gradient from higher concentration to lower concentration. It is using up energy. The energy is stored in the form of ATP. To move across the concentration gradient ATP is needed.

So, we can say that the whole experiment undergoes the Active transport process.