Biology 2.1.4 Flashcards
Digestive Enzymes work ___ of Cells.
Outside.
Define ‘Metabolism’:
The Sum of all the Reactions happening in a Cell or Organism.
What are ‘Enzymes’?
Enzymes are Biological Catalysts that Speed up Chemical Reaction, without getting Involved/ Used up.
What is the ‘Lock and Key Theory’?
Substrates are Specific to 1 Active Site.
Define ‘Active Site’:
Part of Enzyme where Specific Substrate Binds on to start Catalysing Reactions. Built up of Amino Acids.
Define ‘Substrate’:
Bind to Specific Enzyme Active Site to Speed up Reactions.
The Specific Shape of an Enzyme is Determined by the ___ ___ that make the Enzyme.
Amino Acids.
When do Enzymes Work Fastest?
At their Optimum Temperature.
What is the Optimum Temperature for Enzymes in the Human Body?
~37’C.
What happens to an Enzyme if it is Heated to far beyond its Optimum Temperature?
It becomes Denatured.
What happens when an Enzyme becomes Denatured?
The Amino Acids that make up its Active Site Deform.
What is the Optimum pH for most Enzymes?
7.
What happens to an Enzyme if the pH is too High or too Low?
It can become Denatured.
___ Changes constantly throughout the Digestive System. How are Enzymes coming out of the Acidic Stomach Optimised for work in the Alkaline Small Intestine?
pH. Bile is Secreted on them. This Neutralises them.
