Unit 2 Cells

Which structures carry out life functions within cells?

• organ systems

• organelles

• organs

• tissues

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During cellular respiration, cells in the body transfer energy from the food you eat into energy for bodily processes. Which gas does the cell give off as a waste product of respiration?

• carbon dioxide

• oxygen

• nitrogen

• helium

When a cell gets ready to divide, it is important that its DNA is copied. When DNA copies itself, which base always pairs up with adenine(A)?

• cytosine (C)

• thymine (T)

• uracil (U)

• . guanine (G)

Which type of energy transformation is controlled by chloroplasts?

• chemical to mechanical

• mechanical to electrical

• light to chemical

• heat to electrical

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Which statement correctly describes a function of the organelles in this model?

• The mitochondria and chloroplasts are sources of energy for the cell.

• The cytoplasm and the cell membrane deliver nutrients around the cell.

• The mitochondria and the cell wall sort and package proteins for the cell.

• The chloroplasts and cytoplasm send and receive messages around the cell.

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Unlike animal cells, plant cells contain a

• nucleus to perform photosynthesis.

• cellulose-based cytoplasm that makes these cells sturdy

• . . cellulose-based cell wall that makes these cells sturdy.

• mitochondrion to perform photosynthesis.

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Plants gather the suns energy with light absorbing molecules. What are these molecules called?

• . pigments

• thylakoids

• chloroplasts

• glucose

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As the basic units of life, cells are living systems that carry out all of the functions needed to sustain life. Which process is common to all cells?

• All cells get nutrients from the air.

• All cells need and use energy

• All cells make their own food

• All cells allow organisms to move

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What is the significance of cell division?

• to make ATP

• to prevent replication

• to repair and replace other cells

• to make glucose

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A student watched a video and found out that red blood cells (RBC) have a different function than white blood cells (WBC). Based on what the student learned from the video, which of the following is most likely true about these types of cells?

• . RBC and WBC use carbon dioxide to release energy.

• . RBC and WBC have different structures

• . RBC and WBC carry oxygen.

• RBC and WBC fight diseases.

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