Unit 3 Test: Cell Structure and Function

Which of the following best describes the main function of an organism?

• An organism is a living being that operates independently and performs all functions necessary for life.

• An organism is a group of cells that cannot perform life processes.

• An organism is a non-living thing that supports life.

• An organism is only made up of chemicals.

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Which of the following best explains the cell theory statement: "All cells arise from pre-existing cells"?

• Cells can form from non-living materials.

• Cells are created by organ systems.

• New cells are produced when existing cells divide.

• Cells are only found in plants.

Which of the following best describes a stimulus?

• Anything that causes a reaction or change in an organism.

• The process of making food in plants.

• The passing of genetic traits from parent to offspring.

• The sum of all chemical processes in an organism.

Why are prokaryotic cells considered the most abundant cell type on Earth?

• Because they include all bacteria, which exist in massive numbers.

• Because they are found only in plants.

• Because they have a nucleus.

• Because they are larger than eukaryotic cells.

Why is equal separation of DNA important during cell division?

• It ensures that each cell gets the same number of ribosomes.

• It allows the cell to produce more energy.

• It results in even sets of DNA for each cell.

• It helps the cell move faster.

Which scientist was the first to discover and name cells using a simple lens microscope in 1665?

• Robert Hooke

• Anton Van Leeuwenhoek

• Louis Pasteur

• Charles Darwin

Why did Anton Van Leeuwenhoek's microscope make an important contribution to science?

• It was the first to use electricity

• It allowed the discovery of single-celled organisms

• It could magnify 1000X

• It was the first microscope made of plastic

Plant and animal cells are examples of which type of cell?

• Eukaryotic cells

• Prokaryotic cells

• Bacterial cells

• Fungal cells

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Compare and contrast prokaryotic and eukaryotic cells using evidence from their definitions and examples.

• Prokaryotic cells lack a nucleus and include all bacteria, while eukaryotic cells have a nucleus and include plant and animal cells.

• Both prokaryotic and eukaryotic cells have a nucleus and are found in plants.

• Prokaryotic cells are only found in animals, while eukaryotic cells are only found in bacteria.

• Eukaryotic cells are the most abundant due to the number of bacteria.

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If you were to compare a cell to a factory, which organelle would be most similar to the "powerhouse" that provides energy for the cell's activities?

• Mitochondria

• Golgi Apparatus

• Cell Wall

• Chloroplast

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