Bio chapter 2 Quiz – Deck 3 Flashcards
During a chemical reaction, _____ are changed into _______
REACTANTS are changed into PRODUCTS
Are most chemical reactions EXOTHERMIC or ENDOTHERMIC reactions?
EXOTHERMIC reaction – get hotter / the reaction GIVES OFF energy.
Example: lighting a match
Chemical reactions that absorb energy/get colder are _____ reactions
ENDOTHERMIC reaction
Example: Reacting baking soda and vinegar
In an EXOTHERMIC reactions do products have MORE or LESS energy than reactants?
The product has LESS energy than the reactants
The energy required to begin a reaction a is called _____
Activation energy
In an ENDOTHERMIC reactions do products have MORE or LESS energy than reactants?
The product has MORE energy than The reactants
Enzymes are a type of _____
Protein
What do CATALYSTS do?
Catalysts speed up chemical reactions
Enzymes are biological ______s that speed up chemical reactions
Catalysts
Enzymes speed up chemical reactions by ______ing the activation energy of the reaction (this means it takes LESS energy to begin the reaction)
Reducing
How do enzymes decrease the activation energy of reactions?
They give the reaction a service to occur on
The reactants that an enzyme works on our known as ____s
Substrate
LOCK AND KEY MODEL: the SHAPE of an enzyme‘s ____ site matches the SHAPE of the ______ the enzyme reacts to
The enzyme’s ACTIVE site
The shape of the SUBSTRATE
When the enzyme and substrate are bonded together temporarily, the structure formed is called the ______
Enzyme – substrate complex
Is the enzyme (which serves as a catalyst during a reaction) changed by the reaction?
An enzyme is NOT CHANGED by the reaction
