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Q.1)	Which one represents facilitated diffusion?

A.

I

B.

II

C.

III

D.

I and II

E.

I and III

Q.2)	Does a cell expend energy for facilitated diffusion?

A.

Yes

B.

No

C.

Sometimes

Q.3)	Which one shows active transport?

A.

I

B.

II

C.

III

D.

I and II

E.

I and III

Q.4)	Which one shows diffusion?

A.

I

B.

III

C.

I and III

Q.5)	Which of these is/are considered passive transport?

A.

I, not II

B.

II, not I

C.

I and II

D.

I and III

E.	I, II, and III

Q.6)	A solution of 1 M glucose is separated by a selectively permeable membrane from a solution of 0.2 M fructose and 0.7 M sucrose.  The membrane is NOT permeable to the sugar molecules, only to water.  Indicate which side is initially hypertonic to the other side.

A.

side A

B.

side B

C.	neither A nor B

Q.7)	Facilitated diffusion across a cellular membrane requires ______________ and moves a solute ______________ its concentration gradients.

A.	energy and transport proteins; down

B.	energy and transport proteins; against

C.	energy; against

D.	transport proteins; down

E.	transport proteins; up

Q.8)	The fluidity of membranes in a plant in cold weather may be maintained by

A.	increasing the number of phospholipids with saturated hydrocarbon tails.

B.	activating an H+ pump.

C.	increasing the concentration of cholesterol in the membrane.

D.	increasing the proportion of peripheral proteins.

E.	increasing the number of phospholipids with unsaturated hydrocarbon tails.

Q.9)	A plant cell placed in a hypotonic environment will

A.	plasmolyze.

B.

shrivel.

C.	become turgid.

D.	become flaccid.

E.

lyse.

Q.10)	The fluid mosaic model describes biological membranes as consisting of

A.	a phospholipid bilayer with proteins sandwiched between the layers.

B.	a lipid bilayer with proteins coating the outside of this hydrophobic structure.

C.	a phospholipid bilayer with proteins embedded in and attached to it.

D.	a protein bilayer with phospholipids embedded in it.

E.	a cholesterol bilayer with proteins embedded in the hydrophobic center.

Q.11)	Pinocytosis involves

A.	the fusion of a newly formed food vacuole with a lysosome.

B.	receptor-mediated endocytosis and the formation of vesicles.

C.	the pinching in of the plasma membrane around small droplets of external fluid.

D.	pseudopod extension as vesicles move along the cytoskeleton and fuse with the plasma membrane.

E.	the accumulation of specific large molecules in a cell.

Q.12)	Which of the following letters consists of areas that have both hydrophilic and hydrophobic parts?

A.

A

B.

B

C.

C

D.

D

E.

E

Q.13)	Which of the following areas consists of a protein's hydrophobic section?

A.

A

B.

B

C.

C

D.

D

E.

E

Q.14)	Which of the following is the hydrophilic head group of a phospholipid?

A.

A

B.

B

C.

C

D.

D

E.

E

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