You Are a Scientist Observing a Membrane Through Which Water

question 3

Multiple Choice

You are a scientist observing a membrane through which water and some small hydrophobic molecules can freely pass along a concentration gradient from high to low.However,some sugar molecules are too large to pass through the membrane either way without the assistance of passive transport proteins.Additionally,small Na⁺ ions and some proteins can pass through the membrane against the concentration gradient,but both require the assistance of active transport proteins.What general type of membrane are you observing?

• A)impermeable
• B)inpenetrable
• C)semipermeable
• D)completely permeable

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