LTiu attenpDt Feedback Which of the following are characteristics of facilitated

Question

LTiu attenpDt Feedback Which of the following are characteristics of facilitated diffusion? 3 Choose one or more: A. It cannot internally concentrate a solute relative to the external environment. B. It only operates unidirectionally (to move solutes into the cell). C. It involves substrate-specific carrier proteins. D. Solutes are chemically modified (such as by addition of a phosphate group) as they enter the cell. E. It represents an important uptake system for bacteria living in dilute aquatic environments F. It does not require energy expenditure by the cell. VIEW SOLUTIONC K 18/23 > 20 OF 23 QUESTIONS COMPLETED

Explanation / Answer

Answer - A, C and F

Facilitated dissusion requires carrier proteins, it won't use any ATP, it is one type of passive process.

It is bidirectional - B won't come

Solute not modifided after binds to carrier proteins.- D not a facilitated dissusion

In dilute environment inside the cell the nutrient concentration is high compare to external, so to uptake nutrient it requires ATP because it is against the gradient. So E is not answer

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