Question

1. Which of the following best describes a condition where a membrane separates two solutions that are NOT in equilibrium?

A

a rainbow

B	equilibrium

C	a homogeneous solution

D	neighboring solutions that have unequal concentrations of molecules

2. In this lab, we will use dialysis tubing to....

A	simulate biological membranes

B	separate blood from urine

C	turn starch blue

D	turn starch brown

3. Biological membranes have different types of pores and channels, and different permeability to small molecules depending on size and charge. In this lab, you can assume that the dialysis tubing we are using are permeable to....

A

starch

B	water and potassium iodide

C	complex sugars

D	small animals

4. Kinetic energy is a property of the atom, and also of more complex structures such as molecules. You can actually see kinetic energy of non-living things in action under the microscope. When we visualize this, we call what we see...

A

diffusion

B	Brownian motion

C

osmosis

D	all of the above

5. One word to describe the effect of water diffusion across a membrane, which alters the water pressure on one side of the membrane with respect to the other is....

A

osmosis

B

lysis

C

aquaporin

D	equilibrium

6. Suppose that you place a red blood cell in a hypertonic solution containing penetrating molecules. In this environment, you would expect the cell to eventually

A	swell and burst

B

shrink

C	remain the same in size

D	photosynthesize

7. For the "egg lab", what is the main objective?

A	to determine which egg has more mass

B	to determine which egg is hypertonic to the other

C	to determine which solution the egg is placed in is hyper- or hypo-tonic solution

D	to determine which egg is isotonic with the egg

8. The main difference between a 'prediction' and a 'hypothesis', is that predictions....

A	are framed as an "if...then...because" statement

B	are framed as a general statement

C	are framed as an "always....true" statement

D	are framed as an "correct....incorrect" statement

9. Read each of the following procedural steps for plasmolyzing Elodea sprig and then select the correct order below.

Locate a region of healthy cells and sketch a few adjacent cells

Sketch the plasmolyzed cell

While touching one corner of the coverslip with a piece of Kimwipe to draw off the
water, add a drop of concentrated salt solution to the opposite corner

Obtain a leaf from an Elodea or Water sprite plant

A	4, 2, 3, 1

B	3, 1, 4, 2

C	2, 3, 1, 4

D	4, 1, 3, 2