Cell Cycle and Cancer CFA #1

A diagram of the life cycle of a plant is shown. Which statement best explains how the cell cycle is important to the life cycle of the plant?

• The cell cycle enables the plant to produce a diverse population of offspring.

• The cell cycle allows plants to grow and develop.

• The cell cycle prevents an overproduction of plant offspring.

• The cell cycle ensures that only the best fit plants survive to reproduce.

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A cell is observed to have twice the amount of DNA in its nucleus. Which of the following best describes its stage in the cell cycle?

• The cell is in the G1 phase because it is performing regular cell activities like photosynthesis.

• The cell has completed the S phase, because it has replicated its DNA.

• The cell has temporarily exited the cell cycle.

• The cell has successfully divided through cytokinesis.

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What type of cells are produced through the cell cycle?

• Somatic cells; genetically identical

• Gametic cells; genetically different

• Somatic cells; genetically different

• Gametic cells; genetically identical.

The graph shows the two major phases of the cell cycle. Why does a cell spend the majority of its time in Interphase?

• A cell spends most of its time in Interphase to complete nuclear division.

• A cell spends most of its time in Interphase to mutate the DNA so that each daughter cell is unique.

• A cell spends most of its time in Interphase to bring in waste products from outside the cell.

• A cell spends most of its time in Interphase because it is growing, carrying out processes such as cellular respiration and transport, and preparing to divide.

Which of the following correctly identifies the stage of the cell cycle and the activity that occurs there?

• 
• 
• 
• 

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Uncontrolled cell growth leads to -

• An embryo

• A gland

• Cancer
• An organ

Scientists determined the total mass of DNA from a sample of animal cells. The masses of equal numbers of cells were taken during three different stages of the cell cycle. Stage I contains cells massed during G₁ of the cell cycle.

Which statement best describes the cells during Stage II?

(5.A 2021)

• The cells have replicated their DNA, but have not completed mitosis and cytokinesis.

• The cells have completed mitosis and cytokinesis without replicating their DNA.

• The cells have replicated their DNA and completed mitosis and cytokinesis.

• The cells have temporarily exited the cell cycle without replicating their DNA.

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Cancer is defined as the

• uncontrolled division of mutated cells

• normal division of cells

• normal DNA replication

• abnormal ATP synthesis

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A ________________is a critical point where stop and go signals can regulate the cell cycle, ensuring that mutated cells do not divide.

• tumor

• checkpoint

• growth factor

• oncogene

When it occurs at the proper time, programmed cell death (apoptosis)

• will disrupt homeostasis
• may cause defective genetic info to be passed to the next generation of cells
• is an important regulatory process that maintains the health of a multicellular organism
• can contribute to the development of cancer