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If a cell in S phase is fused with a cell in G1:

1. The G1 nucleus immediately enters the S phase
2. The S nucleus stops DNA replication
3. The G1 nucleus directly enters G2 phase
4. Both nuclei enter the M phase immediately
Subtopic:  Intro to Cell Cycle & Interphase |

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Cyclins and cyclin-dependent kinases (CDKs) are:

1. Two key classes of regulatory molecules that determine a cell's progress through the cell cycle
2. The products of the proto-oncogenes in a eukaryotic cell
3. Two very important promoters that are involved in oncogenes
4. Mediators of apoptosis
Subtopic:  Intro to Cell Cycle & Interphase |
 80%
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A cell passes the G1/S transition. This cell will:

1. be allowed to replicate DNA only if there is adequate nutrients and growth signaling.
2. progress through S-phase even if environmental conditions become unfavorable.
3. become quiescent if the environmental conditions become unfavorable.
4. not be subjected to any control check point during the completion of the cycle.
Subtopic:  Intro to Cell Cycle & Interphase |

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Apart from tissue stem cells, which of the following cells in the human body are good examples of being in reversible G0 phase?

1. Mature hepatocytes
2. Senescent cells
3. Differentiated muscle
4. Differentiated bone
Subtopic:  Intro to Cell Cycle & Interphase |

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If an organisms lives in an environment that increases the risk of damage to chromosomes, which of the following would be beneficial?

1. Development of gametes into individuals without fertilization
2. Reproduction by binary fission
3. Syngamy
4. A life cycle excluding meiosis
Subtopic:  Intro to Cell Cycle & Interphase |

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During which phase of the cell cycle does a mature human RBC replicate its DNA?
1. S phase
2. G1 phase
3. G2 phase
4. None

Subtopic:  Intro to Cell Cycle & Interphase |
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