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1 | |
Cells can permanently stop midway in the cell cycle and not complete the cycle. |
| | A) | True |
| | B) | False |
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2 | |
DNA must replicate after cell division occurs. |
| | A) | True |
| | B) | False |
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3 | |
The diploid chromosome number for the house fly is 12. The haploid number of chromosomes found in their gametes would be ______. |
| | A) | 1 |
| | B) | 3 |
| | C) | 6 |
| | D) | 12 |
| | E) | 24 |
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4 | |
Each duplicated chromosome prior to division will be held together at a region called the ______ . |
| | A) | tetrad |
| | B) | synapsis |
| | C) | cross-over |
| | D) | chromatid |
| | E) | centromere |
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5 | |
Prior to division, each chromosome is composed of two genetically identical parts called ______ . |
| | A) | dyads |
| | B) | nucleosomes |
| | C) | chromatin |
| | D) | sister chromatids |
| | E) | centromeres |
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6 | |
During mitosis, homologous chromosomes pair up and separate. |
| | A) | True |
| | B) | False |
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7 | |
Which of the following is NOT a function of cell division? |
| | A) | growth of multicellular organisms |
| | B) | repair of multicellular organisms |
| | C) | reproduction of single-celled organisms |
| | D) | reproduction of multicellular organisms |
| | E) | aerobic cellular respiration of multicellular organisms |
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8 | |
The greater the complexity of the organism, the greater the number of chromosomes within the cell. |
| | A) | True |
| | B) | False |
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9 | |
Which of the following statements is NOT correct in regard to cell division? |
| | A) | Chromatin uncoils to form chromosomes. |
| | B) | Chromatin is found within the nucleus. |
| | C) | Chromatin is made up of the DNA double helix and associated proteins. |
| | D) | Chromosomes can be seen just as cell division is about to occur. |
| | E) | Each species generally has a characteristic number of chromosomes. |
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10 | |
Which of the following statements is NOT correct about eukaryotic chromosomes? |
| | A) | Many proteins, termed histones, appear to play primarily a structural role. |
| | B) | A human cell contains at least two meters of DNA. |
| | C) | The packing unit, termed a nucleosome, gives chromatin a beaded appearance. |
| | D) | The DNA double helix is wound around a core of histone molecules in a nucleosome. |
| | E) | Diffuse chromatin is easier to move about during cell division than compact chromosomes. |
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11 | |
During the cell cycle, interphase lasts longer than mitosis. |
| | A) | True |
| | B) | False |
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12 | |
Microtubules, once formed, will always remain together. |
| | A) | True |
| | B) | False |
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13 | |
During interphase, the cell is resting. |
| | A) | True |
| | B) | False |
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14 | |
Which of the following statements about mitosis is NOT correct? |
| | A) | Mitosis is cell division that produces two daughter cells. |
| | B) | Each daughter cell formed by mitosis has the same number of chromosomes as the parent cell. |
| | C) | Each daughter cell formed by mitosis has the same kinds of chromosomes as the parent cell. |
| | D) | The parent cell and the daughter cells are genetically identical. |
| | E) | During mitosis, the centromeres divide and the sister chromatids stay together. |
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15 | |
What is each chromatid called after the centromeres divide and the sister chromatids separate during mitosis? |
| | A) | daughter chromosome |
| | B) | offspring chromatin |
| | C) | polar centriole |
| | D) | dyad |
| | E) | tetrad |
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16 | |
Which of the following characteristics of mitosis is NOT correct? |
| | A) | Mitosis occurs in somatic cells. |
| | B) | 2N --> 2N |
| | C) | 2N --> N |
| | D) | Mitosis is important for growth and repair of multicellular organisms. |
| | E) | Mitosis occurs when unicellular organisms reproduce asexually. |
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17 | |
Which spindle fiber will lengthen, thereby pushing the chromosomes apart during anaphase? |
| | A) | polar spindle fibers |
| | B) | centromeric spindle fibers |
| | C) | centrosomes (MTOC) |
| | D) | aster fibers |
| | E) | centriolar fibers |
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18 | |
Which spindle fiber will shorten during anaphase, thereby pulling the chromosomes apart? |
| | A) | polar spindle fibers |
| | B) | centromeric spindle fibers |
| | C) | centrosomes (MTOC) |
| | D) | aster fibers |
| | E) | centriolar fibers |
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19 | |
Name the protein subunit that is found within microtubules. |
| | A) | actin |
| | B) | myosin |
| | C) | tubulin |
| | D) | collagen |
| | E) | DNA |
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20 | |
When does DNA replication occur in the cell cycle? |
| | A) | interphase |
| | B) | prophase |
| | C) | metaphase |
| | D) | anaphase |
| | E) | telophase |
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21 | |
______ consists of mitosis and interphase. |
| | A) | Cell division |
| | B) | The cell cycle |
| | C) | The life cycle |
| | D) | Oogenesis |
| | E) | Spermatogenesis |
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22 | |
Where are centrosomes (microtubule-organizing-centers) located in an animal cell? |
| | A) | mitochondria |
| | B) | Golgi apparatus |
| | C) | chromatids |
| | D) | centromeres |
| | E) | centrioles |
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23 | |
Which part of a cell probably organizes microtubules, including those of the spindle? |
| | A) | dyads |
| | B) | centrosomes (MTOC) |
| | C) | centromeres on a chromosome |
| | D) | chromatids on a chromosome |
| | E) | Golgi apparatus |
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24 | |
Which structure within a cell brings about chromosomal movement? |
| | A) | mitochondria |
| | B) | Golgi apparatus |
| | C) | centromeres |
| | D) | mitotic spindle |
| | E) | nuclear membrane |
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25 | |
If a cell is to divide, when do the organelles, such as centrioles, duplicate? |
| | A) | interphase |
| | B) | prophase |
| | C) | metaphase |
| | D) | anaphase |
| | E) | telophase |
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26 | |
Which of the following stages has a distinct nuclear envelope and nucleoli and indistinct chromatin threads? |
| | A) | interphase |
| | B) | prophase |
| | C) | metaphase |
| | D) | anaphase |
| | E) | telophase |
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27 | |
Which of the following is the correct sequence of mitotic phases? |
| | A) | metaphase, anaphase, telophase, prophase |
| | B) | anaphase, prophase, metaphase, telophase |
| | C) | prophase, anaphase, metaphase, telophase |
| | D) | prophase, metaphase, anaphase, telophase |
| | E) | prophase, metaphase, telophase, anaphase |
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28 | |
During ______ , the chromosomes first become visible. |
| | A) | interphase |
| | B) | prophase |
| | C) | metaphase |
| | D) | anaphase |
| | E) | telophase |
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29 | |
During ______ , spindle fibers attach to the centromeres of each chromosome. |
| | A) | prophase |
| | B) | prometaphase |
| | C) | metaphase |
| | D) | anaphase |
| | E) | telophase |
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30 | |
At the start of ______ , the sister chromatids separate and the daughter chromosomes move up to the poles of the spindle. |
| | A) | interphase |
| | B) | prophase |
| | C) | metaphase |
| | D) | anaphase |
| | E) | telophase |
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31 | |
During ______ , the nuclear envelope begins to fragment and the nucleolus begins to disappear. |
| | A) | interphase |
| | B) | prophase |
| | C) | metaphase |
| | D) | anaphase |
| | E) | telophase |
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32 | |
During prophase, spindle fibers appear between the separating centriole pairs. They become attached to the ______ of a chromosome. |
| | A) | chromatids |
| | B) | chromatin |
| | C) | centromere |
| | D) | aster |
| | E) | centrosomes (MTOC) |
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33 | |
During ______ , the chromosomes are now at the equator of the spindle. |
| | A) | interphase |
| | B) | prophase |
| | C) | metaphase |
| | D) | anaphase |
| | E) | telophase |
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34 | |
At the close of ______ , the centromeres uniting the chromatids split. |
| | A) | interphase |
| | B) | prophase |
| | C) | metaphase |
| | D) | anaphase |
| | E) | telophase |
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35 | |
Which of the following is NOT a component of a spindle? |
| | A) | spindle poles |
| | B) | asters |
| | C) | fibers |
| | D) | chromosomes |
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36 | |
Which part of a spindle consists of arrays of short microtubules that radiate from the spindle pole? |
| | A) | asters |
| | B) | centrioles |
| | C) | spindle fibers |
| | D) | microtubule organizing center |
| | E) | centromere |
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37 | |
During which stage will daughter chromosomes move toward the poles of the spindle? |
| | A) | interphase |
| | B) | prophase |
| | C) | metaphase |
| | D) | anaphase |
| | E) | telophase |
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38 | |
______ begins when the chromosomes arrive at the spindle poles. |
| | A) | Interphase |
| | B) | Prophase |
| | C) | Metaphase |
| | D) | Anaphase |
| | E) | Telophase |
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39 | |
Which of the following comparisons is NOT correct? |
| | A) | prophase--chromosomes appear |
| | B) | telophase--spindle appears |
| | C) | metaphase--chromosomes aligned at the equator |
| | D) | anaphase--daughter chromosomes move toward the poles |
| | E) | interphase--DNA replicates |
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40 | |
During ______ , chromosomes become indistinct but the nucleoli and the nuclear envelope reappear. |
| | A) | interphase |
| | B) | prophase |
| | C) | metaphase |
| | D) | anaphase |
| | E) | telophase |
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41 | |
Cytoplasmic division of a cell is called ______. |
| | A) | mitosis |
| | B) | cytokinesis |
| | C) | cleavage furrowing |
| | D) | cell plate formation |
| | E) | synapsis |
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42 | |
Which type of cell will form a cleavage furrow during cell division? |
| | A) | animal cells |
| | B) | plant cells |
| | C) | bacterial cells |
| | D) | fungal cells |
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43 | |
What causes the cleavage furrow in animal cells to constrict? |
| | A) | tubulin filaments |
| | B) | myosin filaments |
| | C) | actin filaments |
| | D) | microtubules |
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44 | |
Which of the following comparisons is NOT correct regarding mitosis? |
| | A) | animal cells--cleavage furrow |
| | B) | plant cells--cell plate |
| | C) | animal cells--centrioles and asters |
| | D) | plant cells--centrioles but no asters |
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45 | |
Which of the following statements is NOT correct about mitosis in plant and animal cells? |
| | A) | Spindle fibers appear in both plant and animal cell mitosis. |
| | B) | Centrioles are seen in animal but not plant cell mitosis. |
| | C) | Asters are seen in animal but not plant cell mitosis. |
| | D) | Cell furrowing occurs in animal but not plant cell mitosis. |
| | E) | A cell plate is formed in animal cells but not in plant cells during cytokinesis. |
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46 | |
Vesicles that fuse to form a cell plate during cytokinesis in plant cells come from the ______ . |
| | A) | Golgi apparatus |
| | B) | mitochondrion |
| | C) | lysosomes |
| | D) | ribosomes |
| | E) | nucleus |
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47 | |
Which of the following sequences shows the correct life cycle for humans? |
| | A) | diploid egg + diploid sperm --> haploid zygote --> mitosis --> haploid adult --> meiosis --> diploid gametes |
| | B) | diploid egg + diploid sperm --> haploid zygote --> meiosis --> haploid adult --> mitosis --> diploid gametes |
| | C) | haploid egg + haploid sperm --> diploid zygote --> mitosis --> diploid adult --> meiosis --> haploid gametes |
| | D) | haploid egg + haploid sperm --> diploid zygote --> meiosis --> diploid adult --> mitosis --> haploid gametes |
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48 | |
Which of the following statements is NOT correct? |
| | A) | Gametes contain half the number of chromosomes found in somatic cells. |
| | B) | Somatic cells have the diploid number of chromosomes. |
| | C) | The haploid number of chromosomes in humans is 23. |
| | D) | The diploid number of chromosomes in humans is 23 pairs. |
| | E) | Each human parent contributes eleven and a half pairs of chromosomes to the zygote. |
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49 | |
In which organ will meiosis occur for the human female? |
| | A) | ovary |
| | B) | testes |
| | C) | liver |
| | D) | pancreas |
| | E) | kidney |
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50 | |
In animals, ______ occurs during the production of the egg and the sperm. |
| | A) | fragmentation |
| | B) | mitosis |
| | C) | meiosis |
| | D) | regeneration |
| | E) | budding |
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51 | |
Which of the following statements is NOT correct when cells undergo meiosis? |
| | A) | Meiosis ensures that the chromosome number remains constant generation after generation. |
| | B) | Meiosis ensures that each generation has a different genetic makeup than the previous one. |
| | C) | Meiosis ensures that each newly formed daughter cell receives the same number and kinds of chromosomes. |
| | D) | Meiosis results in four daughter cells. |
| | E) | Meiosis occurs in the production of egg and sperm cells in animals. |
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52 | |
Which of the following statements is NOT correct about meiosis? |
| | A) | Meiosis involves one duplication of chromosomes. |
| | B) | Meiosis requires two divisions. |
| | C) | Meiosis results in four daughter cells. |
| | D) | The four daughter cells have one of each pair of chromosome. |
| | E) | The four daughter cells have the same number of chromosomes as the parent cell. |
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53 | |
Prior to meiosis I, DNA replication occurs, and each chromosome has two sister chromatids. Therefore, each chromosome can be called a ______ . |
| | A) | homologous chromosome |
| | B) | daughter chromosome |
| | C) | dyad |
| | D) | tetrad |
| | E) | synapsis |
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54 | |
When homologous chromosomes come together and line up side by side, it is termed ______ . |
| | A) | crossing-over |
| | B) | synapsis |
| | C) | replication |
| | D) | meiosis |
| | E) | mitosis |
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55 | |
When does synapsis and crossing-over occur in meiosis? |
| | A) | prophase I |
| | B) | prophase II |
| | C) | metaphase I |
| | D) | metaphase II |
| | E) | anaphase I |
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56 | |
In ______ , pairs of homologous chromosomes line up at the equator of the spindle. |
| | A) | prophase I |
| | B) | prophase II |
| | C) | metaphase I |
| | D) | metaphase II |
| | E) | anaphase I |
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57 | |
What is the exchange of genetic material between nonsister chromatids called? |
| | A) | cell cycle |
| | B) | DNA replication |
| | C) | synapsis |
| | D) | crossing-over |
| | E) | synapsis |
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58 | |
Replication of DNA occurs before the start of meiosis I and again before meiosis II. |
| | A) | True |
| | B) | False |
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