SAT Biology Practice Test 2: Water, Cell Membranes, and Transport

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Question 4 questions

Time 3 minutes

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1. Which of these BEST describes the part of the molecule shown?

A. It is hydrophilic.
B. It forms the outer layer of the plasma membrane.
C. It is composed of phosphate atoms.
D. It contains nonpolar covalent bonds.
E. It is capable of hydrogen bonding.

2. A plant cell is placed in a hypotonic solution. As a result, the cell will

A. lyse
B. swell but remain intact
C. shrivel
D. remain unchanged
E. take up solutes

3. A solute cannot move into a cell by crossing the phospholipid bilayer of the membrane. It can, however, enter through a membrane protein. The fact that solute molecules are entering the cell MOST LIKELY indicates that

A. energy is being expended by the cell
B. the solute is moving against its concentration gradient
C. the solute molecules are hydrophilic
D. the cell is in a hypotonic solution
E. solute concentration is higher inside than outside the cell

4. How can a water molecule BEST be described?

I. It is nonpolar.

II. It has an equal electron distribution.

III. It is able to form hydrogen bonds.

A. I only
B. II only
C. III only
D. I and II
E. I and III