Standardized Test Prep

Multiple Choice

1. Animal cells have all of the following EXCEPT

   • mitochondria.

   • chloroplasts.

   • a nucleus.

   • a cell membrane.

2. The nucleus includes all of the following structures EXCEPT

   • cytoplasm.

   • a nuclear envelope.

   • DNA.

   • a nucleolus.

3. The human brain is an example of a(n)

   • cell.

   • tissue.

   • organ.

   • organ system.

4. Which cell structures are sometimes found attached to the endoplasmic reticulum?

   • chloroplasts

   • nuclei

   • mitochondria

   • ribosomes

5. Which process always involves the movement of materials from inside the cell to outside the cell?

   • phagocytosis

   • exocytosis

   • endocytosis

   • osmosis

6. Which of the following is an example of active transport?

   • facilitated diffusion

   • osmosis

   • diffusion

   • endocytosis

7. The difference between prokaryotic and eukaryotic cells involves the presence of

   1. a nucleus.

   2. genetic material in the form of DNA.

   3. chloroplasts.

   4. a cell membrane.

Questions 8–10

In an experiment, plant cells were placed in sucrose solutions of varying concentrations, and the rate at which they absorbed sucrose from the solution was measured. The results are shown in the graph below.

d

8. In this experiment, sucrose probably entered the cells by means of

   1. endocytosis.

   2. phagocytosis.

   3. osmosis.

   4. active transport.

9. The graph shows that as the concentration of sucrose increased from 10 to 30 mmol/L, the plant cells

   1. took in sucrose more slowly.

   2. took in sucrose more quickly.

   3. failed to take in more sucrose.

   4. secreted sucrose more slowly.

10. Based on the graph, the rate of sucrose uptake

    1. increased at a constant rate from 0 to 30 mmol/L.

    2. decreased at varying rates from 0 to 30 mmol/L.

    3. was less at 25 mmol/L than at 5 mmol/L.

    4. was constant between 30 and 40 mmol/L.

Open-Ended Response

11. What would you expect to happen if you placed a typical cell in fresh water?

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