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| 1 | |
Cell division in unicellular organisms results in ____ individuals. |
| | A) | 4 |
| | B) | 2 |
| | C) | 1 |
| | D) | 8 |
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| 2 | |
Which best describes prokaryotes? |
| | A) | Unicellular bacteria |
| | B) | Prominent nucleus |
| | C) | Many chloroplasts |
| | D) | All of these |
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| 3 | |
Chromosomes are composed of _____. |
| | A) | DNA only |
| | B) | proteins only |
| | C) | DNA and proteins |
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| 4 | |
Prokaryotes primarily reproduce _____. |
| | A) | by binary fission |
| | B) | sexually |
| | C) | via meiosis |
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| 5 | |
If a cell with 46 chromosomes undergoes mitosis, the daughter cells will have _____ chromosomes. |
| | A) | 23 |
| | B) | 46 |
| | C) | 92 |
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| 6 | |
The region where sister chromatids are attached to one another is called the _____. |
| | A) | centromere |
| | B) | spindle |
| | C) | aster |
| | D) | centriole |
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| 7 | |
The _____ most likely provide(s) the material for spindle formation. |
| | A) | nucleus |
| | B) | cytoskeleton |
| | C) | sister chromatids |
| | D) | plasma membrane |
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| 8 | |
Which of the following is NOT associated with prophase? |
| | A) | Fragmentation of the nuclear envelope |
| | B) | Disappearance of the nucleolus |
| | C) | Separation of the sister chromatids |
| | D) | Visible chromosomes |
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| 9 | |
After _____ nuclear division is completed. |
| | A) | prophase |
| | B) | metaphase |
| | C) | telophase |
| | D) | interphase |
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| 10 | |
Alignment of the chromosomes at the equator of the spindle is characteristic of _____. |
| | A) | metaphase |
| | B) | prophase |
| | C) | anaphase |
| | D) | telophase |
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| 11 | |
Mistakes in the process of mitosis may result in _______. |
| | A) | the duplication of chromosomes in cells |
| | B) | the partial distribution of chromosomes |
| | C) | the destruction of surrounding cells |
| | D) | All of these |
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| 12 | |
The DNA is replicating during the ________ stage of the cell cycle. |
| | A) | mitotic |
| | B) | G1 |
| | C) | G2 |
| | D) | S |
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| 13 | |
New methods of cancer treatment prevent _____, which cuts off the supply of nutrients and oxygen to the tumor. |
| | A) | metastasis |
| | B) | angiogenesis |
| | C) | differentiation |
| | D) | anaplasia |
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| 14 | |
A disorganized, generally encapsulated mass that does not invade adjacent tissue is known as a _____. |
| | A) | neoplasia |
| | B) | benign tumor |
| | C) | anaplasia |
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| 15 | |
Interphase consists of the __________ stages of cellular growth and division. |
| | A) | G1, G2 and M |
| | B) | G1, S and G2 |
| | C) | M, S, and G2 |
| | D) | M, S and G1 |
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| 16 | |
The p53 protein _____. |
| | A) | inhibits repair enzymes |
| | B) | stops the cell cycle during repair |
| | C) | inhibits apoptosis |
| | D) | All of the above |
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| 17 | |
Programmed cell death is known as _____. |
| | A) | mitosis |
| | B) | cytokinesis |
| | C) | apoptosis |
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| 18 | |
When most cancers occur, _____ is absent or nonfunctional. |
| | A) | the p53 gene |
| | B) | survivin |
| | C) | angiogenesis |
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| 19 | |
If the diploid number of an organism is 30, the haploid number of the gametes is ___________. |
| | A) | 30 |
| | B) | 60 |
| | C) | 15 |
| | D) | 10 |
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| 20 | |
When mutations occur in proto-oncogenes, they become cancer causing agents called ______. |
| | A) | tumor suppressor genes |
| | B) | oncogenes |
| | C) | stem cells |
| | D) | haploid cells |
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