Characteristics of Cells

What is a cell?

• A device I can make calls on.

• a large organism

• the smallest functional and structural unit of all living organisms.

• Part of your muscles that contains small amount of blood.

Answer explanation

Fun Fact

There are over 200 different types of cells in the human body, each performing specific functions.

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Which of the following is a plant organ responsible for trapping light energy to make food?

• leaf

• fruit

• petal

• root

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The following picture shows a microscopic view of blood. Blood is made of different types of cells that work together.

Which of the following best describes blood?

• organs

• tissues

• organism

• organ system

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In biology class, Zach observes cells. Each cell has a structure that separates the inside of the cell from the environment. Which structure is Zach observing?

• nucleus

• cytoskeleton

• cell membrane

• genetic material

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Which of these is the smallest?

• cells

• atoms

• molecules

• cell membranes

What is the result of homeostasis at the cellular level?

• The cell dies.

• The cell divides.

• The cell no longer obtains energy.

• The environment within the cell is stable.

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Which of the following describes the structure of the endoplasmic reticulum?

• a system of folded membranes

• a tiny organelle that has no membrane

• a rigid, protective layer found outside the cell membrane

• an organelle surrounded by a double membrane and containing DNA

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The diagram below shows molecules inside and outside of a cell. Molecules move from areas of high concentration to low concentration.

What is the name of the process that will move molecules into the cell?

• diffusion

• exocytosis

• photosynthesis

• cellular respiration

Which of the following statements describes a characteristic of a eukaryote?

• It has no cytoplasm

• It has DNA in a nucleus.

• It is made of many cells.

• It has DNA in its cytoplasm.

Plants can provide the materials that animals use in cellular respiration, and animals can provide some of the materials that plants use for photosynthesis. This image below shows the relationship between photosynthesis and cellular respiration.

According to the diagram, how does cellular respiration aid the process of photosynthesis?

• It produces ATP.

• It produces glucose.

• It produces mitochondria.

• It produces carbon dioxide.

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