Question

The movement of glucose across the cell membrane through facilitated diffusion is a form of passive transport because

A) a transport protein is needed.
B) glucose is transported according to concentration gradient.
C) intramembrane receptors are used.
D) no cellular energy is spent.

Answer 1

Explanation:

Glucose is a six-carbon sugar that provides energy needed by cells. Since glucose is a large molecule, it is difficult to be transported across the membrane through simple diffusion. Hence, it diffuses across membranes through facilitated diffusion, down the concentration gradient

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Answer 2

Answer:

(D)

Explanation:

passive transport does not require energy. in facilitated diffusion, even though it requires a transport protein the transfer of substances doent require energy as it takes place along the concentration gradient. energy expenditure takes place only if the substances move against the concentration grasient.

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