Enzymes Flashcards
What is the function of an enzyme
The function of an enzyme is to speed up reactions by providing an alternative reaction pathway of lower activation energy. (Kate)
The model that explains that the active site is flexible and the catalytic group of the enzyme is brought into proper alignment by the substrate is called?
Lock and Key model
Sarah M
An enzyme is a protein molecule that acts as a biological catalyst.
What is a catalyst?
Chemical substances that can accelerate chemical reactions whilst remaining unchanged at the end of the reaction, making them reusable.
(Ashlee)
What is the chemical composition of enzymes
Enzymes are protein molecules, they have long chains of sequences of amino acids that have been folded into a specific shape (Amanda)
What is the saturation point, in relation to the rate of enzyme reactions?
When all enzymes are at their highest efficiency, and substrate levels will not increase the reaction rate. - Alex.P
Which enzyme was tested when we experimented with liver and hydrogen peroxide?
Catalase - Alex.P
Give an example of ‘enzyme specificity’
- amylase acting on starch, converting it to glucose
- rennin acting on milk proteins, causing it to curdle
- catalyse acting on toxic hydrogen peroxide and converts it to harmless water and oxygen gas. (Ashlee)
What is an enzyme?
A substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
-Sophie
Define metabolism
The sum total of all chemical reactions occurring within a living organism - Caitlin
The point at which enzymes and substrates ‘fit together’ is known as what?
The active site - Caitlin
What two things are enzymes sensitive to?
- Temperature.
- pH.
- Caitlin
Three examples of enzyme specificity.
- Amylase reacts on starch to creat glucose
- Renin reacts on milk proteins to curdle milk
- Catalase and Hydrogen peroxide react to make water and oxygen
- Caitlin
What was the dependent variable of the prac. activity with catalase and hydrogen peroxide
Height of the bubbles - Caitlin
What is metabolism?
Metabolism is the sum total of all chemical reactions occurring within a living organism. It is divided into two: anabolic and catabolic. Morgan..
What is anabolic metabolism?
The building up of reactions (use up energy, endergonic)
-Sophie
