1. Chapter 2-1

2.  These molecules have specific jobs in the cell.  Carbohydrates  Lipids  Proteins  Nucleic Acids

3.  Provide the cell with energy and support  They are sugars (starch, cellulose, and glycogen)  Energy  Plant cells make sugar during photosynthesis  Sugar is stored at starch  Support  Plant cells also make cellulose for support  Where do all carbohydrates come from?  Plants

4.  Make up the cell membrane  Fats, oils, waxes:  What happens when they mix with water?  Does not mix.  The double layer keeps water in or out of the cell.

5.  How to you get proteins?  From the food you eat.  Made of amino acids  Jobs:  Proteins control the chemical activity of a cell and support growth and repair.

6.  Two types  DNA and RNA  Holds the instructions for maintenance, growth and reproduction in the cell  DNA holds the information  RNA takes the information where it is needed.

7.  All chemical reactions take place in water  In the cell membrane the tails repel water and the heads attract water.  Keeps water from going in or out of a cell  See page 45