1. Biology homework if you completed the correct page listed on 11-9-09 but read the wrong section for these questions (3.3)

2.  How is the recorder powered?  Chemical energy is transformed into electrical energy which is then converted into mechanical energy  Energy must change forms to “power” the cassette

3.  Light energy from sun was absorbed into the paper and was converted into HEAT  HEAT is first activation energy  Burning releases energy = EXERGONIC – so the energy released during burning allows the substance to keep burning.

4.  Maltose = 2 glucose  Sucrose = glucose and fructose  Maltase is an enzyme  Enzymes have specific structures  Enzymes bind like a lock and key to the substrate  If maltase if shaped a specific way, it can only fit with maltose and cannot fit together with sucrose because the shapes of the substrate (sugar) is different.

5.  Substrate and enzyme collide  The enzyme fits to the “active site”  The enzyme changes shape somewhat  Since the enzyme fits in place, the overall shape changes  The NZ (enzyme) lowers the activation energy to allow the reaction to occur  The product (new thing) is release from the enzyme

6.  Reactions would just occur randomly if there were no Enzymes  Cells would have to move nutrients into/through/out of the cell much faster if there was no organized system of events  There would potentially be a buildup of products that the body doesn’t need and wastes could also build up if they weren’t shipped out efficiently.  Cells would change shape and relationships with each other based on the random nature of chemical reactions occurring or not