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1 | | Thin, threadlike processes within the cytoplasm that function in various kinds of cell movement are |
| | A) | microfilaments and microtubules |
| | B) | cilia and flagella |
| | C) | centrioles |
| | D) | vesicles |
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2 | | The nucleolus is a small, dense body composed mainly of |
| | A) | RNA and protein |
| | B) | DNA |
| | C) | invaginated cytoplasm |
| | D) | chromatin |
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3 | | Chromatin fibers coil into rod-like structures known as |
| | A) | ribosomes |
| | B) | lysosomes |
| | C) | chromosomes |
| | D) | DNA |
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4 | | Passive mechanisms that transport materials across the cell membrane include all of the following except |
| | A) | diffusion |
| | B) | filtration |
| | C) | osmosis |
| | D) | endocytosis |
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5 | | The mechanism in which molecules or ions spread randomly from areas of higher concentration to areas of lower concentration is |
| | A) | filtration |
| | B) | osmosis |
| | C) | exocytosis |
| | D) | diffusion |
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6 | | If cells swell and rupture after being placed in a solution of unknown salt concentration, the solution was __________ to the cells. |
| | A) | hypertonic |
| | B) | hypotonic |
| | C) | isotonic |
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7 | | Which of the following substances can diffuse readily through the cell membrane? |
| | A) | sodium |
| | B) | carbon dioxide |
| | C) | glucose |
| | D) | amino acids |
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8 | | Molecules such as glucose that are too large to pass through the membrane pores and are insoluble in lipids enter the cell from a high to low concentration using |
| | A) | active transport |
| | B) | filtration |
| | C) | endocytosis |
| | D) | facilitated diffusion |
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9 | | The substance that moves through the cell membrane during osmosis is |
| | A) | glucose |
| | B) | water |
| | C) | sodium |
| | D) | oxygen |
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10 | | Osmosis is a special case of |
| | A) | filtration |
| | B) | diffusion |
| | C) | facilitated transport |
| | D) | pinocytosis |
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11 | | Solutions with a higher osmotic pressure than body fluids are called |
| | A) | isotonic |
| | B) | hypertonic |
| | C) | hypotonic |
| | D) | hypoosmotic |
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12 | | When fluid is forced through a membrane by hydrostatic or blood pressure, the mechanism is called |
| | A) | filtration |
| | B) | facilitated diffusion |
| | C) | controlled by electrically gated channels |
| | D) | hormone mediated |
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13 | | In the process of exocytosis |
| | A) | white blood cells remove bacteria from tissue |
| | B) | fluid is brought into the cell |
| | C) | substances are released by the cell when ATP levels are sufficient |
| | D) | receptors determine if a substance will be taken into the cell |
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14 | | Active transport requires a cell or ATP energy but passive transport does not. |
| | A) | True |
| | B) | False |
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15 | | The phase of the cell cycle in which cell contents grow and duplicate is |
| | A) | interphase |
| | B) | metaphase |
| | C) | prophase |
| | D) | telophase |
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16 | | Chromosomes first appear during |
| | A) | prophase |
| | B) | metaphase |
| | C) | anaphase |
| | D) | telophase |
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17 | | Which of the following occurs during telophase? |
| | A) | the chromosomes line up between the centrioles |
| | B) | the centrioles move toward opposite ends of the cell |
| | C) | the chromosomes are pulled toward the centrioles |
| | D) | chromosomes approach the centrioles and a nuclear envelope forms |
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18 | | Which of the following series of events of mitosis is in the correct sequence? |
| | A) | telophase, anaphase, metaphase, prophase |
| | B) | prophase, telophase, metaphase, anaphase |
| | C) | anaphase, prophase, metaphase, telophase |
| | D) | prophase, metaphase, anaphase, telophase |
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19 | | The process by which cells develop different characteristics in structure and function is called |
| | A) | maturation |
| | B) | replication |
| | C) | hybridization |
| | D) | differentiation |
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20 | | Which of the following is not a characteristic of cancer? |
| | A) | hyperplasia |
| | B) | differentiation |
| | C) | metastasis |
| | D) | invasiveness |
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21 | | What is differentiation? |
| | A) | cells migrate to different parts of the body |
| | B) | cells turn on some genes and turn off others |
| | C) | cells no longer know how to divide properly |
| | D) | membranes let some substances in and not others. |
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22 | | All of the structures described in the composite cell can be found in every cell regardless of function. |
| | A) | True |
| | B) | False |
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23 | | The cell membrane is a static structure that separates one cell from another. |
| | A) | True |
| | B) | False |
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24 | | Peripheral proteins are found only on the outside of the cell membrane and are not found inside the cell. |
| | A) | True |
| | B) | False |
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25 | | Ions cannot pass through directly through the phospholipid bilayer and must use protein "channels" that pass through the cell membrane. |
| | A) | True |
| | B) | False |
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26 | | Nutrients are received, processed, and used in the cytoplasm of the cell. |
| | A) | True |
| | B) | False |
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27 | | Flagella are found on the free surfaces of epithelial cells; cilia are longer, more abundant, and move cells within the body. |
| | A) | True |
| | B) | False |
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28 | | Microtubules are composed of the globular protein tubulin. |
| | A) | True |
| | B) | False |
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29 | | The cytoplasm is the site of ribosome production. |
| | A) | True |
| | B) | False |
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30 | | The cell membrane is a selective barrier that controls which substances enter and leave the cell. |
| | A) | True |
| | B) | False |
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31 | | Diffusion through a membrane will occur whenever a concentration gradient exists. |
| | A) | True |
| | B) | False |
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32 | | All cells come from lineages of stem cells and progenitor cells. |
| | A) | True |
| | B) | False |
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