GEN. bio.

Question 1

1. The figure below shows a set-up consisting of two regions separated by a membrane. Glucose is added to one side of the membrane. What natural phenomenon has occurred in this setup?

Answer 1

osmosis

Question 2

2. Blue ink was added to water which gradually forms a blue solution. Which of the following statements correctly describes the movement of ink in the water?

Answer 2

The ink molecules spread from an area of higher ink concentration to an area of lower concentration.

Question 3

3. Someone at the other end of a restaurant smokes a cigarette but you may smell and even breathe in the smoke. The movement of this smoke is similar to what specific type of transport?

Answer 3

diffusion

Question 4

4. The concentration of sodium ions in a cell is 10 times less than the concentration of the surrounding fluid. How can sodium ions move into the cell?

Answer 4

facilitated diffusion

Question 5

5. Which of the following correctly describes a substance that contains a solute and a solvent?

Answer 5

solution

Question 6

6. Which of the following statements is correct about placing a cell in a hypotonic solution?

Answer 6

The water enters the cell toward the area of higher solute concentration.

Question 7

10. In the figure below, a thin membrane contains 25% sugar solution submerged in a solution of 5% sugar. Which of the following will most likely happen in the setup?

Answer 7

The water from the beaker will enter the membrane since it has higher solute concentration.

Question 8

7. Which of the following terms refers to the fluid pressure that causes the plasma membrane to push against the cell wall?

Answer 8

turgor pressure

Question 9

8. Which of the following terms will complete the statement below?

A cell may_______when moved from isotonic to hypertonic solutions, whereas a cell may______when moved from hypotonic to

isotonic solutions.

Answer 9

shrivel; return to its normal shape

Question 10

9. The total solute concentration in a red blood cell is about 2%. Sucrose cannot pass through a red blood cell’s plasma membrane, but water and urea can. Osmosis will cause such a cell to shrink the most when the cell is immersed in which of the following solutions?

Answer 10

hypertonic urea solution

Question 11

11. Identify the correct term being described in each of the following statements.
12. It refers to the diffusion of water across a selectively permeable membrane from an area with high concentration to one with low concentration. osmosis

Answer 11

osmosis

Question 12

12. Identify the correct term being described in each of the following statements.
13. It refers to the diffusion of water across a selectively permeable membrane from an area with high concentration to one with low concentration.

Answer 12

osmosis

Question 13

14. It is the general movement of molecules from an area of higher concentration to one with a lower concentration

Answer 13

diffusion

Question 14

16. This state occurs when solute concentrations are the same on both sides of a membrane and water molecules move at the same rate in both directions.

Answer 14

isotonic

Question 15

17. It refers to a solution where water is drawn out of the cell.

Answer 15

hypertonic

Question 16

18. It refers to a solution where water is drawn into the cell.

Answer 16

hypotonic

Question 17

19.It is a mixture of substances that has a uniform distribution of constituent molecules.

Answer 17

solution

Question 18

20. It is one of the components of a homogeneous mixture that is usually solid.

Answer 18

solute

Question 19

21. It is one of the components of a homogeneous mixture that is usually liquid.

Answer 19

solvent

Question 20

22. Classify the following situations based on the tonicity of the surrounding environment. Choose from isotonic, hypotonic, or hypertonic.

Many animals living in an estuary, such as oysters, blue crabs, and some fishes, are able to cope with the changes in the salinity of their environment by using their specialized gills and kidneys.

Answer 20

hypotonic

Question 21

23. It can be observed that plants wilt and are almost dying along a salted roadside.

Answer 21

hypertonic

Question 22

26. A red blood cell is placed in a solution with a high solute concentration which results in the cell shrinking its size.

Answer 22

hypertonic

Question 23

27. Choose the best term that applies in each of the given situations.

When steeping a cup of tea, molecules from the tea cross from the teabag and spread throughout the cup of water.

Answer 23

diffusion

Question 24

28. When a person stays in a water bath for a prolonged time, his or her skin becomes wrinkled due to the water flowing into the upper skin cells.

Answer 24

osmosis

Question 25

29. When a plant cell is placed in a hypotonic solution, the cytoplasm expands and the plasma membrane pushes against the cell wall, but the cell does not burst.

Answer 25

turgor pressure

Question 26

30. Potassium ions can easily pass through the cell membrane without using energy via carrier proteins.

Answer 26

facilitated diffusion

Question 27

15. It is a type of passive transport that requires specific transport proteins to move molecules across a membrane.

Answer 27

facilitated diffusion

Question 28

24. Paramecia live in freshwater environments and use their contractile vacuoles to get rid of excess water.

Answer 28

hypotonic

Question 29

25. Some animals must drink the saltwater to get the water into their bodies, but they maintain it by making the salts concentrated and excreted from the body.

Answer 29

hypertonic

Question 30

13. It refers to the relative concentration of solutes in fluids separated by a selectively permeable membrane.

Answer 30

tonicity