What is the purpose of the cell cycle?

The cell cycle allows for growth and repair of tissues in the body.

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What are the three main phases of the cell cycle?

  1. Interphase
  2. Mitosis
  3. Cytokinesis 

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Describe the processes that take place during interphase.

During interphase, cells grow, synthesise proteins to replicate organelles, and replicate DNA.

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Which phase of the cell cycle takes the longest? 

Interphase takes the longest as the cells prepare for division.

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What happens in mitosis of the cell cycle?

In mitosis, the cell's nucleus divides in two. 

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What happens in cytokinesis?

In cytokinesis, the whole cell or cytoplasm divides in two. 

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Name the three phases of interphase. 

  1. G1 phase
  2. S phase
  3. G2 phase 

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Describe what happens during the G1 phase of the cell cycle.

During G1, the cell grows and makes new proteins to replicate organelles. 

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Describe what happens during the S phase of the cell cycle.

During the S phase, the DNA is replicated.

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Describe what happens during the G2 phase of the cell cycle.

During G2, the cell continues to grow and replicated DNA is checked for errors.

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What are telomeres?

Telomeres are short sections of non-coding DNA at the ends of chromosomes.

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What is the role of the enzyme telomerase?

Telomerase adds extra bases to the ends of chromosomes during each cell cycle.

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What is the function of telomeres?

Telomeres prevent the loss of genes during cell division, they allow continued cell division, and they prevent the shortening of chromosomes.

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