Which of the following are characteristics of facilitated diffusion? Choose one

Question

Which of the following are characteristics of facilitated diffusion? Choose one or more: A. It cannot internally concentrate a solute relative to the external environment. B. It does not require energy expenditure by the cell C. It represents an important uptake system for bacteria living in dilute aquatic environments D. Solutes are chemically modified (such as by addition of a phosphate group) as they enter the cell. E. It only operates unidirectionally (to move solutes into the cell) F. It involves substrate-specific carrier proteins.

Explanation / Answer

Characteristics of facilitated diffusion - B. It does not require energy expenditure by the cell. C. It represents an important uptake system for bacteria living in dilute aquatic environments. F. It involves substrate - specific carrier proteins.

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