Se forman radicales libres cuando los organismos consumen oxígeno para metabolizar glucosa y formar moléculas energéticas. ross hardison, de la universidad estatal de pensilvania, dijo: "mantener el oxígeno bajo control y al mismo tiempo usarlo para producir energia es uno de los mayores equilibrios logrados en la evolución de la vida de la tierra". ¿qué quiso decir?

1. environmental factors, such as ph and temperature, can affect the function of an enzyme. a. true b. false 2. which of the following is an organic molecules (ex. vitamins) that an enzyme? a. coenzyme b. product c. active site d. substrate 3. how do enzymes effect the speed of a chemical reaction? a. they speed it up b. they slow it down c. they have no effect on the speed of a reaction 4. during a chemical reaction, an enzyme is used up so that it can only be used one time. a. true b. false 5. which of the following results from a chemical reaction that is catalyzed by an enzymes? a. active site b. product c. substrate d. coenzyme

How does the nervous system affect the excretory system?

The (blank) states that all loving things are made of cells.