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Info for metabolism quiz

Metabolism All of the chemical reactions that occur within an organism
Where do cells get the energy they need to perform chemical reactions? The food you eat
Energy The ability to. Move or change matter
Activation energy Energy needed to start a chemical reaction
What provides activation energy to start a chemical reaction? ATP
What do all chemical reactions require to. Break chemical bonds and begin the reaction Activation energy
Reactants Starting materials for chemical reactions
Products Newly formed substances of a chemical reaction
what does the chemical reactions in your metabolism? Enzymes
Synthesis Enzymes react with 2 substrate molecules. Substrates join together making one single product (build up)
Degredation Enzymes react with a single substrate molecule. Substrate is broken apart to make 2 substrate molecules. (Break down)
Anabolic Building reaction
Catabolic Break down reaction
Enzymes Protein catalysts that carry out chemical reactions of metabolism
What do enzymes do? Lower activation energy needed to start a chemical reaction so chemical reactions can occur at los temperatures. Increase the speed of chemical reactions.
Catalysts Chemicals that reduce the activation energy of the reaction (enzymes are these)
Substrate Substance on which an enzyme reacts during a chemical reaction
Why do enzymes only react on one specific substrate? Because of its specific size and shape
Active site Where enzymes do chemical reactions on the substrate
Exergonic reaction Energy released
Endogonic Energy absorbed
What is the lock and key hypothesis? Enzymes activity site has a particular shape into which the substrate or substrates fit exactly
What is the induced fit hypothesis? The active site in many enzymes is not exactly the same shape as the substrate but molds itself around the substrate as the enzyme substrate complex is formed
Step 1 Substrate enter active site; enzyme changes shape so its active site embraces the substrates (induced fit)
Step 2 Substrate held in active siteby weak interactions
Step 3 Active site can lower activation energy and speed up a reaction by stressing the substrates putting tension in specific bonds moving it towards a transition state
Step 4 Substrates are converted into products
Step 5 Products are released
Step 6 Active site is available for 2 new substrates
Where do enzymes operate most efficiently In a narrow range of temperature and pH values
Temperature out of the narrow range can do what to the enzyme? Break or strengthen some of the bonds ans change the shape
What is the general rule for non enzymatic reactions? The higher the temperature the faster the reaction
What is the maximum efficient gemperaturefor an enzyme? 40-45 C
Denatured When the enzyme gets too hot or too out of its pH level and the bonds in the structure are broken and the enzyme can no longer function
A pH value outside the effiicient range can do what to the enzyme? Break hydrogen bonds and change the shape of the enzyme making it unable to do a specific chemical reaction
Why are enzymes so sensitive to changes in pH? Great sensitivity of their active site
What pH do most enzymes work best in? 7
Created by: edenbreslauer