Biology 1 chapter 6 part 2 by Poli

Chemical reactions

• destroy atoms

• create atoms

• neutralize atoms

• rearrange atoms

The law of conservation of mass/matter says that atoms

• may not magically appear or disappear

• are not created or destroyed

• are all accounted for

• all responses are correct

The energy needed to start a reaction is called the

• activation energy

• adhesion energy

• radiation energy

• 5-hour energy

Enzymes speed up reactions by

• raising the activation energy

• lowering the activation energy

• by sacrificing themselves to provide energy

Enzymes

• work best at optimal temperatures.

• work best at a certain pH.

• are proteins.

• all responses are correct

What is the substance an enzyme works on is called a

• reactant

• substrate

• catalyst

• car

Catalysts

• are inorganic enzymes.

• speed up reactions by lowering the activation energy required.

• are not used up during a chemical reaction.

• all responses are correct.

Enzymes and substrates fit together like

• locks and keys

• oil and water

The substrate fits into an enzyme in the area called the

• allosteric site

• active site

• camp site

When an enzyme denatures

• it stops working

• it changes shape

• it could be because it was heated or influence by pH

• all responses are correct