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1 | |
Which statement is true? |
| | A) | Technically, mitosis is a nuclear event and does not involve cytokinesis, which is a cytoplasmic event. |
| | B) | Cytokinesis is a part of mitosis. |
| | C) | The terms cytokinesis and mitosis can be used synonymously. |
| | D) | None of the above. |
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2 | |
When discussing the cell cycle, it is important to remember that interphase consists of the following phases: |
| | A) | Cytokinesis, G1, and G0. |
| | B) | G1, S, and G2. |
| | C) | Cytokinesis, G0, and S. |
| | D) | G0, G1, and G2. |
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3 | |
One of the principal events of the G2 phase is the |
| | A) | Production of tRNA. |
| | B) | Synthesis of spindle fiber proteins. |
| | C) | Replication of DNA. |
| | D) | Differentiation of cells into specific tissue types. |
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4 | |
Which statement is true about the cell cycle continuum? |
| | A) | The phases of mitosis are very specific; the stages of the cell cycle are primarily for convenience rather than for the identification of specific events. |
| | B) | The stages of the cell cycle are very specific; the phases of mitosis are primarily for convenience rather than for the identification of specific events. |
| | C) | The phases of mitosis and the stages of the cell cycle are both very specific and are easily identifiable. |
| | D) | The phases of mitosis and the stages of the cell cycle are both identified primarily for convenience rather than because they are easily identified events. |
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5 | |
During which phase of mitosis do the chromosomes line up along the equatorial plane? |
| | A) | Prophase |
| | B) | Metaphase |
| | C) | Anaphase |
| | D) | Telophase |
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6 | |
During which phase of mitosis do the new daughter nuclei form? |
| | A) | Prophase |
| | B) | Metaphase |
| | C) | Anaphase |
| | D) | Telophase |
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7 | |
During which phase of mitosis do the chromosomes begin their migration to their respective poles? |
| | A) | Prophase |
| | B) | Metaphase |
| | C) | Anaphase |
| | D) | Telophase |
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8 | |
Which statement about centrioles is true? |
| | A) | Centrioles are apparently essential in animal cells but they are not usually found in plant cells. |
| | B) | Centrioles are apparently essential in plant cells but they are not usually found in animal cells. |
| | C) | Centrioles are apparently essential in both plant cells and animal cells. |
| | D) | Centrioles are found in most animal cells as well as in a few plant cells, but they do not appear to be essential in any cell. |
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9 | |
In comparing cell division in plant and animal cells, it is important to remember that |
| | A) | The cleavage furrow is found in the plant cell and the cell plate is found in the animal cell. |
| | B) | The cleavage furrow is found in the animal cell and the cell plate is found in the plant cell. |
| | C) | Both the cleavage furrow and the cell plate are found in both the plant cell and the animal cell. |
| | D) | The cleavage furrow and the cell plate are both found in conjunction with both the plant and the animal cell, but they are external to the cell and not in the cell itself. |
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10 | |
The genes involved in determining eye color are found in |
| | A) | The cells in the iris of the eye, but not in other cells. |
| | B) | The embryonic cells that developed into the iris of the eye, but not in other cells. |
| | C) | All of the cells of the eye, but these genes are only expressed in the iris itself. |
| | D) | Every nucleated cell in the body. |
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11 | |
The process of forming specialized cells within a multicellular organism is known as |
| | A) | Cellular synthesis. |
| | B) | Antimetabolite formation. |
| | C) | Differentiation. |
| | D) | None of the above. |
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12 | |
A benign tumor |
| | A) | Tends to spread beyond its original area of growth, but spreads more slowly that a malignant tumor. |
| | B) | Can cause damage by interfering with normal body functions. |
| | C) | Often becomes malignant over time. |
| | D) | All of the above. |
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13 | |
Malignant tumors |
| | A) | Are nonencapsulated. |
| | B) | Metastasize and establish new colonies in other regions of the body. |
| | C) | May cause new blood vessels to grow to supply them with nutrients. |
| | D) | All of the above. |
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14 | |
Radiation therapy |
| | A) | Is often used along with chemotherapy. |
| | B) | May damage healthy tissue as well as cancerous tissue. |
| | C) | Seems to induce apoptosis. |
| | D) | All of the above. |
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15 | |
Gene p53 |
| | A) | Initiates apoptosis, thus cutting the cell's DNA into pieces. |
| | B) | Increases the growth rate of malignant tumors. |
| | C) | Causes cancer cells to divide more rapidly. |
| | D) | All of the above. |
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16 | |
The centromeres split during |
| | A) | anaphase. |
| | B) | prophase. |
| | C) | metaphase. |
| | D) | interphase. |
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17 | |
What would happen if microtubules where prevented from forming during mitosis? |
| | A) | the cell plate would not form |
| | B) | replication would not occur |
| | C) | centromeres would not split |
| | D) | anaphase cannot occur |
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18 | |
The normal state of chromosomes in prophase is as |
| | A) | daughter chromosomes. |
| | B) | chromosomes composed of two chromatids. |
| | C) | chromatids composed of two chromosomes. |
| | D) | chromosomes consist of single chromatids. |
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19 | |
The presence of cell walls in plants is associated with ________ in telophase. |
| | A) | cleavage furrows |
| | B) | spindle fiber formation |
| | C) | differentiation |
| | D) | cell plate formation |
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20 | |
During which stage of the cell cycle does DNA replication occur? |
| | A) | the S stage of interphase |
| | B) | anaphase of mitosis |
| | C) | G2 stage of metaphase |
| | D) | prophase |
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21 | |
Nerve cells do not normally undergo mitosis. This means that |
| | A) | the brain is unimportant. |
| | B) | your brain cannot grow. |
| | C) | cytokinesis will be common in nerve tissue. |
| | D) | transcription of DNA will not occur. |
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22 | |
Radiation is able to successfully control cancer because |
| | A) | cancer cells do not grow rapidly. |
| | B) | cancer cells spend most of their time in the S stage of prophase. |
| | C) | it stimulates programmed cell death. |
| | D) | these agents only affect diseased cells. |
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23 | |
The correct order for the stages of mitosis is |
| | A) | prophase - anaphase - metaphase - telophase. |
| | B) | metaphase - prophase - anaphase - telophase. |
| | C) | prophase - metaphase - anaphase - telophase. |
| | D) | prophase - metaphase - telophase - anaphase. |
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24 | |
Compared to the mother cell, daughter cells at the end of mitosis have __________ number of chromosomes. |
| | A) | half the |
| | B) | the same |
| | C) | twice the |
| | D) | none of the above |
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25 | |
Which one of the following is not an event of telophase? |
| | A) | nucleoli reappear |
| | B) | spindle disappears |
| | C) | daughter nuclei form |
| | D) | centrioles duplicate |
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26 | |
During anaphase |
| | A) | chromosomes become visible. |
| | B) | daughter chromosomes migrate to the poles. |
| | C) | chromosomes line up at the equatorial plane. |
| | D) | cytokinesis is completed. |
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27 | |
Cell division is needed for |
| | A) | growth. |
| | B) | replacement of warn-out cells. |
| | C) | healing of damaged tissue. |
| | D) | all of these. |
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28 | |
Chromosomes are composed of sister chromatids during |
| | A) | interphase. |
| | B) | prophase only. |
| | C) | prophase and metaphase. |
| | D) | prophase, metaphase, and anaphase. |
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29 | |
Sister chromatids contain |
| | A) | identical strands of DNA. |
| | B) | half of a duplex DNA molecule. |
| | C) | different genetic information. |
| | D) | one gene. |
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