Page 74 - Science Course 1 (Book 1)

1. a substance that forms by joining many small molecules together

2. a large macromolecule that does not dissolve in water
3. a long chain of amino acid molecules

4. one or more sugar molecules
5. a macromolecule that forms when long chains of nucleotides join

6. an explanation based on scientific knowledge resulting from many
observations and experiments

7. an explanation stating that living things are made of cells, that the cell is
the smallest unit of life, and that all cells come from preexisting cells

Mo3-L2: Key Concept Organizer

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

Across Down

4. large molecules that form when smaller 1. long chains of sugar molecules
molecules join
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 to grow
8. used to make proteins
9. released through chemical reactions
10. main ingredient in any cell

11. join to form nucleic acids
12. one type of lipid

67