Higher Unit 1 Revision Questions

Quiz Directions

Directions:
1. Answer the questions below by clicking the button next to the best answer choice or typing your correct answer. Each question’s answers are in grey.	2. At the end of every page click the next button to move forward to the next page. DO NOT HIT THE BROWSER’S BACK BUTTON!	3. On the last page of the Quiz you will be able to see which questions are unanswered, are answered and have been flagged.

questions:

1. 1 pts.	The diagram below represents an osmosis experiment, using a model cell. Which line of the table below shows a correct result for the solutions used in the experiment?
	A.	A
	B.	B
	C.	C
	D.	D
	. .

2. 1 pts.	The diagram below shows a plant cell which has been placed in a salt solution. Which line in the table describes correctly the salt solution and the state of the plant cell?
	A.	A
	B.	B
	C.	C
	D.	D
	. .

3. 1 pts.	Thin sections of beetroot and rhubarb tissue were immersed in the same sucrose solution for the same time. This resulted in the plasmolysis of 0% of the beetroot cells and 20% of the rhubarb cells. Which of the following statements can be deduced from these results?
	A.	The sucrose solution was hypertonic to the beetroot cells.
	B.	The sucrose solution was hypotonic to the rhubarb cells.
	C.	The contents of the beetroot cells were hypotonic to the contents of the rhubarb cells.
	D.	The contents of the rhubarb cells were hypotonic to the contents of the beetroot cells.
	. .

4. 1 pts.	After an animal cell is immersed in a hypotonic solution it will
	A.	burst
	B.	become turgid
	C.	shrink
	D.	become flaccid
	. .

5. 1 pts.	Red blood cells have a solute concentration of around 0.9%. Which of the following statements correctly describes the fate of these cells when immersed in a 1% salt solution?
	A.	The cells will burst
	B.	The cells will shrink
	C.	The cells will expand but not burst
	D.	The cells will remain unaffected
	. .

6. 1 pts.	Examine the diagram below, which shows ways in which molecules may move in or out of a respiring animal cell. Which of these could be the diffusion of carbon dioxide?
	A.	A
	B.	B
	C.	C
	D.	D
	. .

7. 1 pts.	Osmosis is the passage through a selectively permeable membrane of
	A.	water from a region of higher solute concentration to a region of lower solute concentration
	B.	solute from a region of lower water concentration to a region of higher water concentration
	C.	water from a region of lower solute concentration to a region of higher solute concentration
	D.	solute from a region of higher water concentration to a region of lower water concentration
	. .

8. 1 pts.	The diagram below shows the set up for an experiment into osmosis in cells. After a few days, which of the following will have occurred?
	A.	a rise in level X, and a drop in level Y
	B.	a drop in level X, and a drop in level Y
	C.	a rise in level X, and a rise in level Y
	D.	a drop in level X, and a rise in level Y
	. .

9. 1 pts.	he diagram below shows the set up for an experiment into osmosis in cells. Which of the diagrams overleaf shows a suitable control for the experiment below?
	A.
	B.
	C.
	D.
	. .

10. 1 pts.	The following diagram shows the appearance of a plant cell immersed in a solution which is isotonic to the cell’s sap. Which of the following diagrams below most accurately represents the appearance of this cell after immersion in a hypertonic solution?
	A.
	B.
	C.
	D.
	. .

11. 1 pts.	Which of the following molecules can both diffuse through a cell membrane
	A.	Amino acids and starch
	B.	Amino acids and water
	C.	Starch and protein
	D.	Protein and water
	. .

12. 1 pts.	Red blood cells burst when they are placed in water because
	A.	the cell contents are hypotonic to the water
	B.	the cell contents are isotonic to the water
	C.	the water is hypotonic to the cell contents
	D.	the water is hypertonic to the cell contents
	. .

13. 1 pts.	Which term best describes how water enters and leaves cells?
	A.	diffusion
	B.	osmosis
	C.	evaporation
	D.	permeation
	. .

14. 1 pts.	Which statement best describes a selectively permeable membrane?
	A.	it lets all substances through
	B.	it does not let substances through
	C.	it is equally permeable to all substances
	D.	it lets some substances through but not others
	. .

15. 1 pts.	A concentration gradient exists between two solutions of
	A.	equal concentrations of the same substance
	B.	equal concentrations of different substances
	C.	different concentrations of the same substance
	D.	different concentrations of different substances
	. .

16. 1 pts.	A 5% sugar solution contains
	A.	5% water and 95% sugar
	B.	5% sugar and 95% water
	C.	95% water and 95% sugar
	D.	5% water and 5% sugar
	. .

17. 1 pts.	In diffusion substances move from
	A.	a high concentration to a high concentration
	B.	a high concentration to a lower concentration
	C.	a low concentration to a low concentration
	D.	a low concentration to a higher concentration
	. .

18. 1 pts.	Three plant cells P, Q and R are found on a microscope slide. Cell P is hypotonic to cell Q and cell R is hypertonic to cell Q. Which cell has the highest water concentration?
	A.	P
	B.	Q
	C.	R
	D.	They all have the same water concentration
	. .

19. 1 pts.	The diagram shows the concentrations of black molecules in four cells. In which direction will the black molecules move?
	A.	from cell 1 to cell 2
	B.	from cell 2 to cell 4
	C.	from cell 4 to cell 3
	D.	from cell 3 to cell 1
	. .

20. 1 pts.	The diagram below shows a model cell that was set up to investigate diffusion through a selectively permeable membrane. Iodine is a small, soluble molecule.
	A.	A
	B.	B
	C.	C
	D.	D
	. .