state standard sb1b - explain how enzymes act as catalysts
TRANSCRIPT
State Standard
SB1B - Explain how enzymes act as catalysts.
Physical vs. Chemical
A ____________ change alters the substance’s ___________ but ______ its ____________.
There is _____ formation of a new substance.
6.2 Chemical Reactions
Chemistry in Biology
Physical reaction
Chapter 6
Physical vs. Chemical Cont’d A __________ __________ is
the process by which atoms or groups of atoms in substances are reorganized into __________ __________.
6.2 Chemical Reactions
Clues that a chemical reaction has taken place include the production of ________ or ________, and formation of a ________, ________, or _______.
________ reversible!
Chemistry in Biology
Chemical reaction
Chapter 6
Chemical Equations
Chemistry in Biology
Chemical formulas describe the ____________ in the reaction and arrows indicate the process of ____________.
Chemical equations have 2 sides: ____________ are the starting substances,
on the left side of the arrow. ____________ are the substances formed
during the reaction, on the right side of the arrow.
6.2 Chemical Reactions
Chapter 6
Example of a chemical equation: During cellular respiration, Glucose and oxygen __________ to form carbon dioxide and water.
Chemistry in Biology
6.2 Chemical Reactions
Chapter 6
Chemical Equations Cont’d
Practice your knowledge by labeling the parts of the equation above.
Chemistry in Biology
The ___________ ____________ is the minimum amount of energy needed for reactants to form products in a chemical reaction.
Energy of Reactions
6.2 Chemical Reactions
Chapter 6
Chemistry in Biology
A ____________ is a substance that ____________ the activation energy needed to start a chemical reaction.
____________ are ____________ that act as ____________ catalysts.
It does not increase how________ product is made – only how
__________ it is made.
Enzymes6.2 Chemical Reactions
Chapter 6
Chemistry in Biology
All living things are driven by constant internal chemical reactions (____________).
Enzymes help these reactions happen quickly enough for an organism to stay __________.
Enzymes increase the rate (__________) of a reaction by lowering activation energy.
6.2 Chemical Reactions
Chapter 6
Enzymes Cont’d
Chemistry in Biology
The reactants that bind to the enzyme are called ___________.
The specific location where a substrate binds on an enzyme is called the __________ ________.
6.2 Chemical Reactions
Chapter 6
Enzymes Cont’d
Chemistry in Biology
6.2 Chemical Reactions
Chapter 6
The active site changes shape and forms the __________-__________ _________, which helps chemical bonds in the reactants to be broken and new bonds to form. This is called __________ ______.
Enzymes Cont’d
Chemistry in Biology
Enzyme activity is affected by factors such as _____, ____________, & other substances.
____________ pH & temperature can change the ________ of the enzyme and render it ________. This is called ____________.
6.2 Chemical Reactions
Chapter 6
Enzymes Cont’d
Chemistry in Biology
Enzymes are __________ for the substrates that they react with…
Enzyme names end with the suffix “-______”. Examples:
____________ breakes down the sugar sucrose ____________ breaks down the sugar lactose ____________ breaks down protein molecules
6.2 Chemical Reactions
Chapter 6
Enzymes Cont’d
Chemistry in Biology
Enzyme action is often compared to the action of ________ & ________…
6.2 Chemical Reactions
Chapter 6
Enzymes Cont’d
…because each enzyme is shaped to fit together with a ____________ substrate and they are ____________.