Chapter 7 Quiz

Question 1

Which experimental treatment would increase the rate of sucrose transport into a plant cell?

Answer 1

Adding a substance that makes the membrane more permeable to hydrogen ions

This treatment would enhance the transport of sucrose by altering the membrane’s permeability.

Question 2

Where are bacteria engulfed by white blood cells destroyed?

Answer 2

Lysosomes

Lysosomes contain enzymes that break down engulfed materials.

Question 3

In the U-tube illustrated above, side A is ________ to side B.

Answer 3

Hypertonic

Side A has a higher concentration of solute (sucrose) than side B.

Question 4

How will increasing the proportion of unsaturated fatty acids in a membrane affect that membrane’s permeability to O2?

Answer 4

Permeability will increase

Unsaturated fatty acids create more fluidity in the membrane, allowing easier passage of O2.

Question 5

Which component in the accompanying figure is hydrophilic?

Answer 5

B

Typically, hydrophilic components are those that interact well with water.

Question 6

Which mechanism serves the function of white blood cells engulfing bacterial intruders?

Answer 6

Phagocytosis

Phagocytosis is a form of endocytosis specifically for large particles and cells.

Question 7

When developing a new drug targeting lung cancer, which characteristic should you target?

Answer 7

Similarity of the drug molecule to other molecules normally transported by lung cells

This ensures the drug can effectively enter lung cells.

Question 8

Under which scenario is the need for osmoregulation the highest?

Answer 8

When a salmon moves from a river into an ocean

The transition from freshwater to saltwater creates a significant osmotic challenge.