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level: Enzymes

Questions and Answers List

level questions: Enzymes

QuestionAnswer
What is Metabolism?-This is simply the Amount of Chemical Reactions that takes Place inside You.
Why do we have Enzymes and not Increase the Temperature?-Increasing the Temperature will make the Useful Reactions Quicker, but also the Unwanted ones will also Speed up - Not Useful. Cells also have a Limit of Heat until it will get Damaged -Enzymes act as a Catalyst, to speed up Reactions without getting Used Up or even Changed -Enzymes then mean Raising Temperatures would be Redundant, and that Specific Reactions will only be Sped Up -Enzymes is a Protein, which is Coded by Genes.
What usually Happens in a Chemical Reaction? What is the Substrate?-In a Chemical Reaction: Things will just either Spilt or Join together. -The Substrate is just the Molecule that will be Changed - so Broken apart or being Fused.
How does an Enzyme do its Role? Why does it do it like that?-Enzymes, are Stupid Specific. They literally will at most have 1 Substrate they can Work With -Enzymes have an Active Site - the Part where the Substrate joins on to in order to Speed the Reaction up -And so if the Substrate does fit in the Active Site, then it will be Catalysed - if not then Nothing will Happen.
How can the Temperature affect Enzyme Activity and the Rate of Reaction?-If the Temperature Increases, at first the Rate of the Reaction will also Increase, as because both the Substrates and the Enzymes move around Quicker - More Collisions. -If it gets Too Hot, then the Enzyme's Shape and Active Site will start to Deform - Denaturing. This means it will be Unable to Catalyse the Reaction it was Specific to, and Never Will. Its Permanent -So when the Temperature has reached the Spot where the Rate is Highest, its the Optimum Spot for the Enzyme. [37 Degrees in Human Bodies usually]
How can the pH affect Enzyme Activity and the Rate of Reaction?-If the pH gets too High or too Low, then the Enzyme will be Denatured, meaning the Shape of its Active Site will be Interfered. -The Point where the Enzyme works best with the pH is the Optimum pH -In the Body, there is no Definite Optimum pH. Some like it Acidic and others, Alkaline
How can the Enzyme Concentration affect Enzyme Activity and the Rate of Reaction?-More Enzymes there is in the Solution - then the more Chance of a Collision with a Substrate Molecule and getting Catalysed -However, adding more Enzymes won't always equal an Increase of Rate of Reaction, as the Number of Substrates will be Limited if left Unchanged
Explain the Practical which Demonstrates how Temperature affects Enzyme Activity? Use the Enzyme Catalyse.-Catalase will break down Hydrogen Peroxide into Water & Hydrogen Gas. -Using a Gas Syringe or an Upside Down Measuring Cylinder that is Full of Water can be Used to see how much Oxygen is made. -So, add a Source of Catalase to a Solution of Hydrogen Peroxide in a Tube - which is then placed in a Water Bath with a Set Temperature -After your Set Time, measure the Oxygen and then Repeat with the a Different Temperature. -Remember, the pH, Size of Potatoes... has to ALL be Controlled.