Day 4 Review Quiz

What is gene expression?

• The process of DNA replication

• The process by which information from a gene is used to make a functional product

• Cell division in stem cells

• The pairing of base sequences

All cells in your body have the same DNA. Why do they perform different functions?

• They have different ribosomes

• They express different genes

• They mutate over time

• They are exposed to different temperatures

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Which of the following causes cells to differentiate into specialized cell types?

• DNA mutations

• Environmental pH

• Gene expression

• Cell division

All cells begin as what type of cells?

• Nerve cells

• Muscle cells

• Stem cells

• Blood cells

What is cell differentiation?

• A change in DNA

• The loss of cell function

• The process by which unspecialized cells become specialized

• Cell death

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How can hormones influence gene expression?

• By breaking down DNA

• By turning specific genes on or off

• By changing the sequence of genes

• By causing mutations

What can happen if genes that control cell division are mutated?

• The cell dies

• The cell divides uncontrollably, possibly causing cancer

• The DNA repairs itself

• The cell becomes inactive

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What is the relationship between gene regulation and cancer?

• Cancer is caused by bacteria altering gene expression

• All cancer cells express the same genes

• Disruption in gene regulation can lead to uncontrolled cell growth

• Gene regulation helps prevent cancer

How does gene expression differ in a skin cell versus a nerve cell?

• They have different DNA

• Different genes are expressed

• One has more organelles

• One has longer DNA

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What allows stem cells to become specialized?

• DNA changing over time

• Losing chromosomes

• Turning on and off specific genes

• Becoming prokaryotic

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