Metabolism Flashcards
(22 cards)
What is metabolism
The chemical proses in with the body must perform in order to maintain life
What is the difference between anabolic and catabolic reaction
Anabolic reactions is when something is being build up in the body. This requires energy is active energy
(Anna builds blocks)
Catabolic reaction when something is destroyed and releases energy
(The cat sat on the bomb)
An enzyme is…
A substance created by a living organism which acts as a catalyser to create a specific chemical reaction
A type of protein
What is a catabolic reaction
A process in which a complex substance are broken down into simpler ones.
What is released from catabolic reaction
Energy
Where does catabolic reactions occur
Cellular respiration
Chemical digestion
What is an anabolic reactions
Simple molecules are built up into more complex substances
What does anabolic reactions require
Energy, used to create the bonds between the molecules
What is an example of anabolic reaction
Protein
What are some features of an enzyme
They lower the energy of a reaction
They catalyse
And they don’t get used up
How many steps are in the lock and key model
Three
What is the site where the substrate joins the enzyme called
Active site
What is the first step of the lock and key model
The enzyme is substrate specific
Meaning: enzymes will only catalyse one specific reaction and substrate. Complementing to each other
What are the two things that are in a lock and key model
An enzyme and a substrate
What is the second step of the lock and key model
~ An enzyme-substrate complex
~ The activation energy lower - which therefore the reaction occurs faster.
What type of reaction is the second step of the lock and key model
Is a catabolic reaction, as the bonds are breaking down between substrate
What happens in the third step of the lock and key model
The products formed are released -> enzymes are unaffected and moves onto catalysis another reaction
What does substrate turn into once the enzyme had been catalysed
A product
What is the first step of the lock and key model called
Enzyme + substrate
What is the second step of the lock and key model called
Enzyme-substrate complex
What is the last step of the lock and key model called
Enzyme + product
How can the lock and key model be an anabolic reaction
If the steps occurred in a backwards motion
3,2,1
