7. Active transport requires
A. energy
B. thenucleus C. chloroplasts D. lysosomes
8. What happens to an animal cell when it is placed in hypertonic (more concentrated) solution?
A. remainthesame B. shrink
C. swell
D. swell,thenshrink
9. What happens to a plant cell when it is placed in a hypotonic (more dilute) solution?
A. itbecomesturgid
B. it becomes plasmolysed C. itundergoescrenation D. itbecomesflaccid
10. What causes water to enter plant roots from the soil?
A. water potential in xylem is higher than the soil
B. waterpotentialinroothaircellsishigherthanthesoil C. waterpotentialinroothaircellsislowerthanthesoil D. water potential in xylem is lower than the soil
11. Which of the following is not true of diffusion?
A. Particles move down a concentration gradient
B. It does not require energy from respiration
C. Apartiallypermeablemembraneisneeded
D. It happens faster when the surface area is increased
12. Which of the following is true about active transport?
A. It does not require energy
B. Particles move down the concentration gradient
C. It is how water moves in and out of cells
D. It uses proteins in the membrane
13. If a substance is transported into a cell faster when given more oxygen, what can be
concluded?
I. Energy is required
II. Respiration is required III. Diffusion is occurring
A. IandIIonly B. IIandIIIonly C. IandIIIonly D. I,IIandIII
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14. Which of the following happen(s) when a plant cell is placed in a very concentrated salt solution?
I. Cytoplasm/cell membrane detaches from the cell wall II. Water enters the cell
III. Cell becomes flaccid and then plasmolysed
A. IandIIonly B. IIandIIIonly C. IandIIIonly D. I,IIandIII