Easy Enzymes. Flashcards
What are the five properties of enzymes?
Enzymes are proteins and proteins can be tested by using the Biuret test.
Each enzyme matches the complementary shape of a substrate.
Enzymes can be used again and again because they are unchanged in a reaction.
Enzyme are influenced by temperature.
Enzymes are influenced by pH.
What is the lock and key hypothesis/model?
The lock and key hypothesis states that the substrate fits perfectly into the active site of an enzyme
What is the active site?
A specific region of an enzyme where the substrate binds and the reaction takes place.
Define denaturation.
A permanent change in the shape of an enzyme’s active site that prevents the binding of a substrate.
Is denaturation reversible?
Denaturation is irreversible.
State the optimum temperature for enzyme activity in plants and humans.
In the human body, the optimum temperature is 37⁰C.
In plants, the optimum temperature is 28⁰C to 30⁰C.
State the optimum pH for the activity of the enzyme pepsin and amylase/trypsin.
The optimum pH for pepsin in the stomach is pH 2.0
The optimum pH for amylase and trypsin is pH 7.5
Finish the following equations: Enzymes are in CAPITAL LETTERS.
hydrogen peroxide ➡ _______ ➡ water and _______
____ ➡ AMLYLASE ➡ maltose ➡ ________ ➡ glucose.
protein ➡ ______ ➡_________➡ TRYPSIN ➡ ______ acids (proteases).
____/_____ ➡ TRIPASE ➡ fatty acids and _______
hydrogen peroxide ➡ CATALASE ➡ water and oxygen.
starch ➡ AMLYLASE ➡ maltose ➡ MALTASE ➡ glucose.
protein ➡ PEPSIN ➡ peptides ➡ TRYPSIN ➡ amino acids (proteases).
fats/lipids ➡ TRIPASE ➡ fatty acids and glycerol.
Diagrams:
Know what a pH scale looks such as what is weak/strong acid and weak/strong alkali.
