Biology Unit 1 Review

Which organelles must work together to provide food and energy to a plant cell?

• A. chloroplast and mitochondria

• B. cell membrane and cell wall

• C. mitochondria and vacuole

• D. chloroplast and vacuole

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How do Euglena and sperm cells use flagella?

• A. for locomotion

• B. for detecting light

• C. for waste removal

• D. for maintaining homeostasis

What does a Euglena require to exhibit phototactic behavior?

• A. cilia

• B. an eyespot

• C. a pseudopod

• D. a contractile vacuole

How would the presence of cilia, flagella, and pseudopods improve the chances of survival of a unicellular protist?

• A. by decreasing the rate of cell division

• B. by increasing the rate of water exchange

• C. by decreasing the energy needs of the organism

• D. by increasing the likelihood of obtaining nutrients

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During which phase of the cell cycle does most cell growth occur?

• A. cytokinesis

• B. interphase

• C. prophase

• D. mitosis

A saltwater plant is placed in fresh water. What will most likely happen to the cells of the plant?

• A. The cell wall will prevent water from flowing in or out of the cells.

• B. The cells will lose water and shrivel.

• C. The cells will gain water and swell.

• D. The cells will stay the same size.

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Which sample most likely contains red blood cells that were put into a hypertonic solution?

• A. Sample 1

• B. Sample 2

• C. Sample 3

• D. Sample 4

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Liver and skin cells are specialized cells that are descended from the same set of stem cells. Why do these specialized cells vary in structure and function?

• A. Liver cells and skin cells receive different amounts of DNA. The additional DNA allows skin cells to develop pigment.

• B. Liver cells and skin cells receive different DNA. The DNA determines the structure and function of each cell.

• C. Liver cells and skin cells receive the same DNA. However, different sets of genes are activated in each cell.

• D. Liver cells and skin cells receive the same DNA. However, liver cells receive more DNA over time.

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How do stem cells become specialized to absorb nutrients from food as intestinal cells?

• A. by gene removal

• B. by gene activation

• C. through translation

• D. through transcription

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How are the enzymes that nerve cells produce different from the enzymes that blood cells produce?

• A. Nerve cells contain more ribosomes than blood cells.

• B. Nerve cells contain more mitochondria than blood cells.

• C. The genes that are activated in nerve cells are different from those activated in blood cells.

• D. The molecules that nerve cells digest are more complex than those digested by blood cells.

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