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4.1 The Cell Theory

  1. Describe how the concept of the cell has changed over the past 200 years.

Answer

  1. Define cytoplasm.
Answer

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4.2 Cell Membranes

  1. What are the differences between the cell and the cell membrane?

Answer

  1. Describe the role played by HLA cell membrane recognition molecules.

Answer

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4.3 Getting Through Membranes

  1. What three methods allow the exchange of molecules between cells and their surroundings?

Answer

  1. How do diffusion, facilitated diffusion, osmosis, and active transport differ?

Answer

  1. Why does putting salt on meat preserve it from spoilage by bacteria?
Answer
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4.4 Cell Size

  1. On the basis of surface area-to-volume ratio, why do cells tend to remain small?

Answer

  1. What is the advantage of having numerous folds in a cell‘s plasma membrane?

Answer

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Human Explorations

4.5 Organelles Composed of Membranes

  1. Make a list of the membranous organelles of a eukaryotic cell and describe the function of each.

Answer

  1. Define the following terms: stroma, grana, and cristae.
Answer
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4.6 Nonmembranous Organelles

  1. Make a list of the nonmembranous organelles of the cell and describe their function.

Answer

  1. Gives three examples of cellular inclusions.

Answer

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4.7 Nuclear Components

  1. Define the following terms: chromosome and chromatin.

Answer

  1. What is a nucleolus?

Answer

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Labeling Exercises

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4.8 Major Cell Types

  1. Diagram a eukaryotic and a prokaryotic cell and show where proteins, nucleic acids, carbohydrates, and lipids are located.

Answer

  1. What two types of organisms have prokaryotic cell structure?

Answer

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