Cells and Life Key Concept Builder LESSON 1 Key Concept

Name
Date
Class
Key Concept Builder
LESSON 1
Cells and Life
Key Concept How did scientists’ understanding of cells develop?
Directions: Add information to each box to complete the essay. Use the prompts to write your paragraphs.
More than 300 years ago, Robert Hooke built a microscope.
1. Explain the contribution of Robert Hooke.
2. Explain the contributions of Matthias Schleiden and Theodor Schwann.
About 20 years after the discoveries of Schleiden and Schwann, German doctor Rudolf
Virchow suggested that all cells come from preexisting cells. The discoveries of all three
scientists were combined to develop the cell theory.
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Cell Structure and Function
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Soon scientists began making more advanced microscopes. They used them to look for cells
in many other places, including in pond water, blood, and other substances.
Name
Date
Key Concept Builder
Class
LESSON 1
Cells and Life
Key Concept How did scientists’ understanding of cells develop?
Directions: Put a check mark on the line before each item that helped scientists develop the cell theory.
1. building the first telescopes
2. building the first microscopes
3. making more advanced microscopes
4. the invention of the electron microscope
5. comparing plant and animal cells
6. discovering protists
Directions: Explain why each statement below is false according to the cell theory.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
7. A one-celled organism is not a living thing.
8. The smallest living unit is the atom.
9. Viruses are not cells, but they are alive.
10. Plants do not come from cells; they come from seeds.
Cell Structure and Function
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Name
Date
Class
Key Concept Builder
LESSON 1
Cells and Life
Key Concept What basic substances make up a cell?
Directions: Use the clues and the terms listed below to complete the puzzle.
carbohydrates
cellulose
cholesterol
DNA
energy
lipids
macromolecules
nucleic acids
nucleotides
proteins
RNA
water
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2
3
4
5
6
7
8
9
10
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Clues
Across
4. large molecules that form when smaller
molecules join
Down
1. long chains of sugar molecules
2. long chains of amino acid molecules
5. provides support in plant cell walls
3. contain genetic material
6. form cell membranes
7. includes instructions that enable cells
8. used to make proteins
10. main ingredient in any cell
to grow
9. released through chemical reactions
11. join to form nucleic acids
12. one type of lipid
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Cell Structure and Function
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
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Name
Date
Class
Key Concept Builder
LESSON 1
Cells and Life
Key Concept What basic substances make up a cell?
Directions: Complete the diagram by writing the functions of each macromolecule after each bullet.
1. Nucleic acids
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Proteins
Lipids
Carbohydrates
Directions: Answer each question on the lines provided. Use complete sentences.
2. What is a macromolecule?
3. Why are nucleic acids important in cells?
4. What is special about the interaction of lipids and water?
Cell Structure and Function
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