Cell Cycle STAAR Blitz

A cell’s DNA is replicating prior to undergoing mitosis. The table shows an error that occurs as the DNA replicates. 

How could this altered DNA sequence cause a problem for the daughter cells that inherits it? 

• 1. The DNA will not be converted into an RNA molecule. 

• 1. The error may affect the synthesis of an important protein

• The error will cause similar errors in all other chromosomes.

• 1. The inherited traits controlled by the DNA will all be recessive.

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Which answer choice best identifies the process illustrated and the stage of cell cycle in which it occurs?

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An image of a cell is shown.

Which phase of the cell cycle is this cell in?

• 1. Go phase

• 1. S phase

• 1. G2 phase

• 1. M phase

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Scientist have reported that more than 95% of the factors that lead to some types of cancers are caused by random DNA-copying errors. During which phase of the cell cycle do these DNA-Copying errors most likely occur? 

• 1. S phase

• 1. G1 phase

• 1. G2 phase

• 1. M phase

The p53 gene stops the progression of the cell cycle when DNA damage is detected. Which of these is most likely to happen in an individual with a mutation in their p53 gene?

• Cell growth would be unregulated which could lead to tumor formation

• Cells with these mutations would no longer undergo mitosis

• The type of mutations that occur in daughter cells would decrease

• The gene would not be replicated before cell division

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