All of the Following Involve Active Transport Across Membranes Except

question 40

Multiple Choice

All of the following involve active transport across membranes except

• A) the movement of mineral nutrients from the apoplast to the symplast.
• B) the movement of sugar from mesophyll cells into sieve-tube elements.
• C) the movement of sugar from one sieve-tube element to the next.
• D) the movement of K⁺ across guard cell membranes during stomatal opening.
• E) the movement of mineral nutrients into cells of the root cortex.

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