Which of the following is FALSE about the membrane transport? a. In secondary ac

Question

Which of the following is FALSE about the membrane transport?

a. In secondary active transport, a hydrophilic molecule (except water and urea) can be transported from its lower concentration to its higher concentration using another molecule moving from its higher concentration to its lower concentration via a carrier protein.

b. In primary active transport, all hydrophilic molecules (including water and urea) can be transported from its lower concentration to its higher concentration using energy from ATP

c. Facilitated and simple diffusion are both passive process.

d. Facilitated diffusion and active transport both require assisted means such as carrier proteins

e. All of the above

f. None of the above.

Question #2

Solution A (1.0 M Sucrose) and solution B (1.0 M NaCl) are separated by a dialysis membrane. If the membrane is spontaneously permeable to Sucrose, NaCl, and Water, what is the INITIAL reaction of Sucrose, NaCl, and water?

a. No diffusion of Sucrose, NaCl, and Water will take place because both solutions are at equilibrium.

b. Sucrose will diffuse from A to B while NaCl and water will diffuse from B to A

c. Sucrose and water will diffuse from A to B while NaCl will diffuse from B to A.

d. Sucrose will diffuse from A to B while NaCl diffuses from B to A; no diffusion of water.

Explanation / Answer

#1 a. False, In secondary active transport, a hydrophilic molecule (except water and urea) can be transported from its lower concentration to its higher concentration using another molecule moving from its higher concentration to its lower concentration via a carrier protein.

#2d. False,Sucrose will diffuse from A to B while NaCl diffuses from B to A; no diffusion of water.

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